Watlow 988 User Manual

Data Communications with the Watlow

Series 988 Family of Controllers

User’s Manual

Includes: 981-984 Ramping 986-989 Temperature or Process 996-999 Dual Channel

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SERIES 988

User Level Targeted:

• New User............................. Go to page 1.1

• Experienced User ................Go to page 2.1

• Expert User .........Go to page 5.1, 6.1 or 7.1

Installer:

• Wiring and installation.........Go to page 2.1

• Setup...................................Go to page 3.1

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Watlow Controls

1241 Bundy Blvd., P.O. Box 5580, Winona, Minnesota 55987-5580; Phone: (507) 454-5300;

0600-0009-0004 Rev B

Supersedes: W98F-XUMN Rev A03 February 1998

Fax: (507) 452-4507

97

TOTAL

CUSTOMER

SATISFACTION

ISO 9001

Registered Company

Winona, Minnesota USA

$15.00

Made in the U.S.A.

Printed on Recycled Paper, 10% Post-consumer Waste.

About This Manual

How to Use this Manual

We have designed this user’s manual to be a helpful guide to your new Watlow controller. The headlines in the upper right and left corners indicate which tasks are explained on that page. If you are a new user, we suggest that your read the first four chapters of this manual.

Notes, Cautions and Warnings

We use notes, cautions and warnings throughout this book to draw your attention to important operational and safety information.

A bold text “NOTE” marks a short message in the margin to alert you to an important detail.

A bold text “CAUTION” safety alert appears with information that is important for protecting your equipment and performance. Be especially careful to read and

follow all cautions that apply to your application.

A bold text “WARNING” safety alert appears with information that is important for protecting you, others and equipment from damage. Pay very close attention to

all warnings that apply to your application.

The ç symbol (an exclamation point in a triangle) precedes a general CAUTION or WARNING statement.

The Ó symbol (a lightning bolt in a triangle) precedes an electric shock hazard CAUTION or WARNING safety statement.

Technical Assistance

If you encounter a problem with your Watlow controller, review all of your configuration information for each step of the setup, to verify that your selections are consistent with your applications.

If the problem persists after checking all the steps, call for technical assistance: Watlow Controls, (507) 454-5300, between 7:00 a.m. and 5:00 p.m. Central Standard Time. Ask for an applications engineer. When you call, have the following information ready:

• the controller’s model number (the 12-digit number is printed on the top of the stickers on each side of the controller case and on the right hand or top circuit board);

• this user’s manual;

• all configuration information;

• the Diagnostics Menu readings.

Comments and Suggestions

We welcome your comments and opinions about this user’s manual and the Series 988 family of controllers. Send them to the Technical Editor, Watlow Controls, 1241 Bundy Boulevard, P.O. Box 5580, Winona, MN 55987-5580. Or call (507) 4545300 or fax them to (507) 452-4507.

Warranty and Returns

For information about the warranty covering the Series 988 family of controllers see the Appendix. The Data Communications User’s Manual for the Series 988 family is copyrighted by Watlow Controls, Inc., © 1997, with all rights reserved. (1385)

Chapter 1 Introduction to Data Communications

Machine-to-Machine Communication

Humans use basic components to exchange messages. Computers and controllers also use certain elements in order to communicate: a character set; a common

NOTE: This manual applies only to controllers with the data communications option (9___-_____R__ or 9___-_____S__ or 9___-_____U__). Please use it in conjunction with the user's manuals.

data link, or interface; and a protocol, to prevent confusion and errors. Serial communication is the exchange of data one bit at a time on a single data

line or channel. Serial contrasts with "parallel" communication, which sends several bits of information simultaneously over multiple lines or channels. Not only is serial data communication typically simpler than parallel, it generally costs less.

Computers need a connecting interface over which to communicate. They may use one pair of wires to send information in one direction and another pair to send in the opposite direction (full duplex). Or, they may use one pair to send in both directions (half duplex).

Bit is simply the contraction of "binary digit," either a "1" or a "0." A byte is a string of seven or eight bits, which a computer treats as a single "character." The ASCII (pronounced "asky") character set uses a unique, seven-bit byte to represent each letter, digit and punctuation mark.

Interfaces

Protocol

Now we need a few rules to "talk" by. Protocol determines who gets to talk when. A protocol is a set of standards for formatting and timing information exchange between electronic systems.

Protocol describes how to initiate an exchange. It also prevents two machines from attempting to send data at the same time. There are a number of different data communications protocols, just as there are different human cultural protocols that vary according to the situation.

A Protocol Example

Let's assume that we have a computer and controllers linked together. They all use ASCII and are connected via a common interface. In process control applications, one device often has greater function and memory capability than the devices it is communicating with. This "master" device always initiates exchanges between it and the connected "remote" devices.

Here's what happens: Imagine "PC-1," the master computer, sitting at the end of a long hallway with nine doors in it. Each door has a remote device behind it. PC-1 has a telephone line to all the devices. The remote devices are busy controlling heaters to specific set points. PC-1 monitors and changes the instructions that each remote device uses to control its heaters.

Introduction to Data Communications, Chapter 1 Data Communications with the Watlow Series 988 Family

1.1

Interfaces

By your request PC-1 wants to talk with device "D-2" to change a set point. PC-1 must first identify D-2 on the line and inquire whether D-2 has time to talk. This electronic knocking on D-2's door is the "connection."

One of three scenarios may occur when PC-1 calls:

1) D-2 answers saying, "This is D-2, go ahead," and PC-1 begins to talk.

2) D-2 answers and says, "I'm too busy to talk now. Wait until I tell you I'm finished."

3) D-2 does not answer, which indicates a possible system malfunction.

Let's take the best-case scenario. Here is a simple version of what happens: D-2 answers and hears PC-1 say, "Hello, D-2. Do you have time to talk?"

D-2 acknowledges PC-1 with a "D-2 here, go ahead." PC-1 then sends an ASCII-encoded message instructing D-2 to change a set point

to 1,000°F. (message) When PC-1 is finished with its message, it says in effect, "That's all, your turn." D-2 replies, "OK," and carries out the instruction. D-2 then takes the protocol lead,

and tells PC-1, "The new set point is 1,000°F." (message) PC-1 says, "OK." D-2 says, "That's all, your turn." PC-1 then takes the protocol lead and says, "Thank you, that's all." D-2 hangs up. (disconnect) That's basically how the connect, message and disconnect protocols work in

Watlow data communications. The hallway in this example is really a communications bus — a common connec-

tion among a number of separate devices. A communications system with multiple devices on a common bus is called a multidrop system.

The exact connect-message-disconnect procedure assures that you are talking to the correct device.

Protocol maintains system integrity by requiring a response to each message. It's like registered mail — you know that your letter has been received because the post office sends you a signed receipt.

In Watlow data communications, a dialog will continue successfully as long as the messages are in the correct form and responses are returned to the protocol leader. If the operator enters an incorrect message, or interference comes on to the data line, there will be no response. In that case the operator or the master must retransmit the message or go to a recovery procedure. If an operator continues to enter an incorrect message or interference continues on the data line, the system will halt until the problem is resolved.

1.2

Data Communications with the Watlow Series 988 Family

Introduction to Data Communications, Chapter 1

Interfaces

EIA-232, EIA-485 and EIA-422 Interfaces

The three interfaces we're concerned with on this controller are EIA-232, EIA-485 and EIA-422.

An EIA-232 interface uses three wires: a single transmit wire; a single receive wire; and a common line. Only two devices can use an EIA-232 interface. A -12 volt signal indicates a 1 and a +12 volt signal indicates a 0. The EIA-232 signal is referenced to the common line rather than to a separate wire, as in EIA-485 and EIA-422. An EIA-232 cable is limited to 50 feet, due to noise susceptibility.

Figure 1.3 - Interface bit signals.

0 bit

1 bit

Bit signals on an EIA-232 interface.

+12V

0 bit

1 bit

0V

Bit signals on an EIA-485 interface.

-12V

0 bit

1 bit

Bit signals on an EIA-422 interface.

+5V

-5V

+5V

-5V

An EIA-485 interface uses three wires: a T+/R+; a T-/R-; and a common line. A

-5-volt signal is interpreted as a 1, a +5-volt signal as a 0. Up to 32 remote devices can be connected to a master on a multi-drop network up to 4,000 feet long.

0V

The EIA-422 interface uses five wires: a "talk" pair; a "listen" pair; and a common line. It can handle one master and up to ten remote devices in a multidrop network up to 4,000 feet long. EIA-422 uses the difference in voltage between the two wires to indicate a 1 or a 0 bit. A 1 is a difference of -5 volts, while a 0 is a difference of +5 volts.

Of these three interfaces, EIA-485 has the lowest impedance, a multiple-device capability, greatest noise immunity and the longest distance capability — up to 4,000 feet of total network cable length.

Introduction to Data Communications, Chapter 1 Data Communications with the Watlow Series 988 Family

1.3

ASCII

Table 1.4 - Comparing Interfaces.

Maximum Maximum Cable Net Length Controllers Type

EIA-232 50 feet 1 3-wire EIA-485 4,000 feet 32 3-wire EIA-422 4,000 feet 10 5-wire

NOTE: The Modbus feature on the Series 988 controllers allows up to 247 controllers to share one EIA-485 network, by using network bridges. See Chapter 6 for more information on Modbus.

ASCII

The ASCII code defines 128 separate 7-bit characters — one for each letter, digit and punctuation mark. ASCII also includes control characters similar to those we find on computer keys, like "backspace," "shift" and "return." It also has ten communications control characters for "identification," "enquiry" (inquiry), "start of text," "end of text," "end of transmission," "acknowledge," "negative acknowledge" and "escape."

The ASCII code is sometimes written in a base-16 number system, called hexadecimal or "hex" for short. The first ten digits of this system are represented by the numbers 0 through 9, and the final six digits are represented by the letters A through F. The 128 ASCII character code with the decimal and hexadecimal equivalents is listed in the Appendix.

Parity Bit

Remember that ASCII is a seven- or eight-bit code. What about that eighth bit? It's called the "parity" bit. A parity bit is added to the ASCII character to verify the accuracy of the first seven bits. Here's how: We are declaring that the number of 1s in the 8-bit character frame will be either always odd or always even. To do that, about half the time we'll have to add another 1 to get an odd or an even number of ones. The other half of the time we'll need to add a 0 so we don't change the total number of 1s.

This way we can detect a single error in the seven-bit group. Take a look at the representation of the transmitted upper case "W." In this case we have selected "odd" parity. The number of 1s in the first seven bits, plus the parity bit, must always total an odd number. The total number of 1s in the binary character 1010111 (W) is 5, already an odd number. Thus our parity bit will be a 0.

Figure 1.4 - ASCII upper case "W" (1010111).

1.4

Data Communications with the Watlow Series 988 Family

If we were transmitting the lower case "w" (binary 1110111), the parity bit would be a 1 because the total number of 1's in the character frame is 6, an even number. Adding the parity bit makes it odd, and consistent with the odd parity rule.

If a noise spike came onto the data line and changed the signal voltage level enough to reverse a 1 to a 0 in the character frame, the receiver would detect that

7-bit character

+V

-V

bit position: 12345678

0 1

odd parity bit

Introduction to Data Communications, Chapter 1

ASCII

error. The total number of 1s would be even and a violation of the odd-parity rule. At Watlow, we use odd, even and no parity. Odd parity sets the parity bit to 0 if there are an odd number of 1s in the first seven

bits. Even parity sets the parity bit to 0 if there are an even number of 1s in the first

seven bits.

No parity ignores the parity bit.

Start and Stop Bits

A "start" bit informs the receiving device that a character is coming, and a "stop" bit tells it that one is complete. The start bit is always a 0. The stop bit is always a 1. We've added the start and stop bits to the transmitted "W" example.

The human speaking equivalent of these bits could be a clearing of the throat to get someone's attention (start bit); and a pause at the end of a phrase (stop bit). Both help the listener understand the message.

Figure 1.5 - ASCII upper case "W" with start and stop bits.

-V

+V

idle line

1 0

start bit

7-bit character

12345678

stop bit

odd parity bit

Baud Rate

The baud rate refers to the speed of data transmission. When a change in signal represents one data bit, baud rate is equal to bits per second (bps). Our rates on the 988 Family of controllers are 300, 600, 1200, 2400, 4800 and 9600 baud.

Computer Languages

Computer languages are simply sets of symbols and rules for their use. There are many computer languages and a wide variety of applications for them. Programmers use languages to enable computers to do real work. We're providing a pilot program written in Quick BASIC to demonstrate data communications with Watlow controllers. You can download the MS-DOS™ version files ("comms4.zip" and "comms4tm.zip" and com5set.exe) from the Watlow BBS, (507) 454-3958.

Syntax

Syntax for a natural language dictates how we put words together to make phrases and sentences. In data communications, syntax also dictates how we order the parts of a message.

Introduction to Data Communications, Chapter 1 Data Communications with the Watlow Series 988 Family

1.5

Syntax

For example, the Series 986-989 parameter for set point information is SP1. The controller's panel will normally display SP1 and set point information whenever you physically press the DISPLAY key to reach SP1 in the parameter sequence. For a computer linked to a controller, "SP1" is part of the syntax for data communications.

If you type just "SP1" on the computer keyboard, the controller won't respond to your computer with the current set point 1 data. The syntax requires spaces and "fields" of specific size to be complete.

Plus, we need to add the protocol. It's like putting a message in an envelope and addressing it. The entire syntax of the SP1 command includes the message protocol's STX (Start of Text) control character, SP1, space, up to four decimal places of set-point data, and a protocol ETX (End of Text) control character.

The whole phrase would look like this:

ASCII Control Character Definitions

ENQ Enquiry (inquiry): Request for a data link. ACK Acknowledge: Affirmative response from the receiver. NAK Negative Acknowledge: Negative response from the receiver. STX Start of Text: Precedes any message from the sender. ETX End of Text: Follows any message from the sender. EOT End of Transmission: Tells the other device that it is its turn to send a mes-

sage.

DLE Data Link Escape: Disconnect signal from the master to devices on the

network.

A Data Communications Conversation

Now that you have a general grasp of the basic ideas and terms behind data communications, we'll take the example further to see how an actual conversation would take place.

The example on the next page follows the exchange between a computer (master) and a controller (remote) as the computer sends a set point data command to the controller.

1.6

That's really all there is to it. Remember — only the "master" may initiate exchanges and every message requires a response.

Data Communications with the Watlow Series 988 Family

Introduction to Data Communications, Chapter 1

An Example of a Data Communication Conversation

Syntax

The computer (the master) initiates an exchange with controller #2 (the remote).

The computer tells the controller to change its set point.

The computer queries the controller for the new set point.

computer

2 <ENQ> (#2, are you there?)

controller

2 <ACK> (I'm #2, I'm here.)

computer

("Here comes a message." "Make SP1 = 500°." "I'm done with the message.")

controller

<ACK> ("I understand.")

computer

("Here comes a message." "What is SP1 value?" "I'm done with the message.")

controller

<ACK> ("I understand [the question].")

The controller confirms that the new set point.

The computer ends the session.

computer

<EOT> ("That's all, go ahead.")

controller

( "Here comes the answer." "The value is 500°." "I'm done with the answer.")

computer

<ACK> ("I understand [the answer].")

controller

<EOT> ("That's all, go ahead.")

computer

<DLE> <EOT> ("Disconnect, please. That's all."

[master waits])

Introduction to Data Communications, Chapter 1 Data Communications with the Watlow Series 988 Family

1.7

Introduction

Notes

1.8

Data Communications with the Watlow Series 988 Family

Introduction to Data Communications, Chapter 1

Chapter 2 Hardware and Wiring

Serial Hardware Interfaces

The Series 981-984, 986-989 and 996-999 controllers are factory-configured to function in a broad variety of applications. The specifics of each controller's configuration is encoded in its model number. Depending on your unit's model number, you have one of three hardware interfaces:

1) EIA-232 (9___-____-_R__) provides one-on-one communication with a maxi-

NOTE: This manual applies only to controllers with the data communications option (9___-_____R__ or 9___-_____S__ or 9___-_____U__). Please use it in conjunction with the user's manuals.

mum network length of 50 feet connecting one controller to one computer.

2) EIA-485 (9___-____-_S__) provides a "multidrop" or multiple-device network with up to 32 addresses with a 4,000-foot network length limit. EIA-422 provides a multidrop network for up to ten devices with a 4,000-foot network length limit. To select the multidrop interface, enter the Setup Menu

[`SEt]. Use the up-arrow or down-arrow key to advance to the Communica- tions Menu [COM]. Press the MODE key until the interface prompt [IntF]

appears. Select either 485 or 422.

3) EIA-232/EIA-485 (9___-____-_U__) If your controller is supplied with a "U" board, you can select via the comms menu either EIA-232 or EIA-485 operation. The [IntF] parameter is defaulted to EIA-232. To select the multidrop interface, enter the Setup Menu [`SEt]. Use the up-arrow or down-arrow key to advance to the Communications Menu [COM]. Press the MODE key until the interface prompt [IntF] appears. (Controllers equipped with the EIA- 232 interface do not require an interface selection.)

Hardware

Your Computer's Serial Interface

You can connect a data communication-equipped Series 981-984, 986-989 or 996999 to any computer with an EIA-422, EIA-232 or EIA-485 serial interface. A personal computer with an EIA-232 serial output card, for instance, can talk to a single EIA-232 equipped controller.

For a multiple-controller network with one personal computer, you'll need a converter to act as a bus, or multiple connection point.

For data communications serial interface converters for EIA-232 (RS-232), we recommend either of these two suppliers:

• DATAFORTH Corp. (formerly supplied by Burr-Brown):

3331 E. Hemisphere Loop, Tuscon, AZ 85706 Tel: 1-800-444-7644, or (520) 741-1404 or Fax: (520) 741-0762 For EIA-422 (RS-422), part number: LDM 422 with a power supply and the correct 25 pin connector for your computer. For EIA-485 (RS-485), part number: LDM 485 with a power supply and the correct 25 pin connector for your computer.

• B & B Electronics Manufacturing Company

707 Dayton Road, PO Box 1040, Ottawa, IL 61350 Tel: (815) 433-5100 or Fax: (815) 434-7094 or Web: http://www.bb-elec.com For EIA-422/ EIA-485 (RS-422/ RS-485), part number: 485OIC with a power supply and the correct 25 pin connector for your computer.

Hardware and Wiring, Chapter 2

Data Communications with the Watlow Series 988 Family

2.1

Wiring

NOTE: The Electronic Industry Association (EIA) RS-232 standard recommends a maximum 50-foot total pointto-point distance.

Communications Wiring

The rest of the chapter explains how to connect your controller to a computer. Consult the instruction manual for your computer's serial port or serial card for detailed serial port pin information. Industrial environments often contain a lot of electrical noise. Take care to isolate your control system.

EIA-232 Interface Wiring

The EIA/-232 communications uses a three-wire, full-duplex system. There is a separate line for transmitting data, a line for receiving data and a common line between the computer and the controller. With EIA-232 you can have only one controller connected to a single computer.

This diagram is a typical wiring example. The connections on the host computer may vary, depending on the model. Refer to your computer or serial card user's manual for specific information.

DB-9 Pinouts

1 DCD 2 receive 3 transmit 4 DTR 5 common 6 DSR 7 RTS 8 CTS

• • • • • 1 2 3 4 5

Transmit 5 Receive 6 Common 7

Figure 2.2 EIA-232 Interface Wiring Diagrams.

6 7 8 9

• • • •

DB-9 female viewed from wire side (typical connections with jumpers)

DB-25 Pinouts

2 transmit 3 receive 4 RTS 5 CTS 6 DSR 7 common 8 DCD 20 DTR

• • • • • • • • • • • • • 1 2 3 4 5 6 7 8 9 10 11 12 13

14 15 16 17 18 19 20 21 22 23 24 25

• • • • • • • • • • • •

DB-25 female viewed from wire side (typical connections with jumpers)

Single Controller

Transmit 5 Receive 6 Common 7

Single Controller

2.2

Data Communications with the Watlow Series 988 Family

Hardware and Wiring, Chapter 2

NOTE: The Electronic Industry Association EIA-485 standard recommends a maximum total network distance of 4,000 feet.

Wiring

EIA-485 Interface Wiring

The EIA-485 communications uses a three-wire, half-duplex system. There are two lines for transmitting and receiving and a common line. Only one device, the computer or a controller, can be speaking at a time. The controller requires at least a 7-millisecond delay between transmission and receipt of data. With EIA-485 you can have from one to thirty-two controllers connected to a computer.

This diagram is a typical wiring example for units shipped after 1993 (see ç Caution on this page). The connections on the host computer may vary, depending on the model. Refer to your computer user's manual for specific information.

As many as 32 units can be connected to an EIA-485 network.

T-/R- 3 T+/R+ 4

Com 7

Controller

ç

CAUTION: For older Series 986989 controllers with a "date code" of 4693 or earlier, terminal 3 is T-/R- (A) and 4 is T+/R+ (B). (See Diagnostics Menu in the User's Manual.)

B A

Gnd

Converter Box or Card

T+/R+ T-/R-

Com

T+/R+ 3 T-/R- 4

Com 7

Controller #1

T+/R+ 3 T-/R- 4

Com 7

Controller #2

Figure 2.3 EIA-485 Interface Wiring Diagrams.

Hardware and Wiring, Chapter 2

Converter box or card terminals with termination, pull-up and pull-down resistors.

+5V

Gnd

B

A

1KΩ

T+/R+

120Ω

T-/R-

1KΩ

Com

If the system does not work properly it may need termination resistors at each end of the network. A typical installation would require a 120-ohm resistor across the transmit/receive terminals (3 and 4) of the last controller in the network and the converter box or serial card. Pull-up and pull-down resistors may be needed to maintain the correct voltage during the idle state.

Data Communications with the Watlow Series 988 Family

2.3

Wiring

NOTE: The Electronic Industry Association (EIA) RS-422 standard recommends a maximum network distance of 4,000 feet.

EIA-422 Interface Wiring

The EIA-422 communications uses a five-wire, full-duplex system. There are two separate lines for transmitting, two lines for receiving and a common line between the computer and the controller. With EIA-422 you can connect from one to ten controllers to a single computer.

This diagram is a typical wiring example for units shipped after 1993 (see ç Caution on this page). The connections to the converter box or computer may vary, depending on the model. Refer to the documentation for specific information.

B' A'

Gnd

R+ RT+

B

T-

A

Com

T+ 3 T- 4 R+ 5 R- 6 Com 7

Figure 2.4 EIA-422 Interface

Wiring Diagrams.

ç

CAUTION: For older Series 986-989 controllers with a "date code" of 4693 or earlier, terminal 3 is T-, 4 is T+, 5 is R- and 6 is R+. (See Diagnostics Menu in the User's Manual.)

T- 3 T+ 4 R- 5 R+ 6 Com 7

Converter Box or Card

As many as 10 units can be connected to an EIA-422 network.

Controller

Controller #1

T+ 3 T- 4 R+ 5 R- 6 Com 7

Controller #2

Converter box with termination pull-up and pull-down resistors.

RD

TD

+5V

B A B A

Gnd

1KΩ

240Ω

1KΩ

If the system does not work properly it may need termination resistors across the receive A and B terminals at the converter. A typical value would be 240Ω. Pull-up and pull-down resistors may be needed to maintain the correct voltage during the idle state.

2.4

Data Communications with the Watlow Series 988 Family

Hardware and Wiring, Chapter 2

Chapter 3 Communications Setup

Connecting the Controller and the Computer

Remove power from both the controller and your computer before connecting them together. Assemble a cable and the appropriate wiring at your computer. Refer to the wiring in Chapter 2. As soon as you connect the data communications lines, you may apply power to your system.

Software Protocols and Device Addresses

There are three communications protocols you may use. Depending on the type of network you need, you must use the correct combination of interface and protocol. Modbus works with all three interfaces.

To run a network with multiple devices Watlow uses the ANSI X3.28 Protocol (based on ANSI X3.28 - 1976 Subcategories 2.2, and A.3) with the EIA-422 and EIA-485 interface. ANSI X3.28 Protocol provides a response to every message. It will also work with the EIA-232 interface, but you are limited to one controller and a host computer.

Setup

To run a two-device network with an EIA-232 interface, you can also use XON/ XOFF Protocol, a simpler protocol. XON/XOFF will also work with the EIA-422 and EIA-485 interface, but the network is limited to two devices — one computer and one controller. XON/XOFF Protocol does not require a device to respond to messages it receives.

To select the protocol, go to the Setup Menu [`SEt]; use the up-arrow or downarrow key to advance to the Communications Menu [COM]. Press the MODE key until the protocol prompt [Prot] appears. Select either [FULL], for ANSI X3.28 2.2

- A.3, [``On] for XON/XOFF, or [Mod], for Modbus RTU.

If you are using ANSI X3.28 Protocol, choose an address number for each controller using the address prompt [Addr], which follows the protocol prompt [Prot]. This prompt will only appear if [Prot] is set to [FULL] or [Mod].

Communications Software

Watlow offers a Windows based configuration and monitoring software package for the 988/989 controllers. We also offer a simple MS-DOS™ communications demonstration program for the Series 981-984, 986-989, and 996-999. Ask your Watlow field sales representative for a copy of the "Comm 4" program, or you can download the files ("comms4.zip" and "comms4tm.zip" and com5set.exe) from the Watlow BBS, (507) 454-3958.

Communications Setup, Chapter 3

Data Communications with the Watlow Series 988 Family

3.1

Setup

(

Figure 3.2 The Communications Menu.

W

A

TL

W

PROCESS

L1 L2 L3 L4

DEV

DISPLAY

% OUT

HOLD

MODE

SERIES 988

RUN

Communications)

Baud rate Data bits and parity

Protocol type

Address Interface type

[COM]

(COM)

bAUd

[bAUd]

dAtA

[dAtA]

Prot

[Prot]

Addr

[Addr]

intF

[IntF]

( ) ( )

( )

Setup at the Controller's Front Panel

• Press the < and > keys simultaneously for three seconds.

• The [SEt] prompt appears in the lower display.

• Press the < or > key until the [COM] prompt appears.

• Press the µ key to advance through the Communications Menu.

• Press the < or > key to select communications values from the table below.

NOTE: Selecting [Mod] automatically sets [dAtA] to [``8n].

Table 3.2 Communications Menu Prompts and Descriptions.

• Document the setup parameters for each device on your network and label each device.

• Press the ∂ key to exit.

Prompt Appears if… Range Factory

default

[bAUd] comms unit (Baud rate) [`300], [`600],

[1200], [2400], [4800], [9600] [9600]

[dAtA] comms unit [``7o] = 7 data bits, odd parity [``7o]

[``7E] = 7 data bits, even parity (see note) [``8n] = 8 data bits, no parity

(Start bit = 1) (Fixed) (Stop bit = 1) (Fixed)

[Prot] comms unit [FULL] = ANSI X3.28 2.2 - A.3 [FULL]

[``On] = XON / XOFF [Mod] = Modbus

[Addr] [Prot] = [FULL] 0 to 31 (ASCII) if [IntF] = [`485] [```0]

or 0 to 9 (ASCII) if [IntF] = [`422] [```0]

[Prot] = [Mod] 1 to 247 if [IntF] = [Mod] [```1]

[IntF] "S" hardware [`485] = EIA-485 Interface type [`485]

[`422] = EIA-422 Interface type

[IntF] "U" hardware [`232] = EIA-232 Interface type [`232]

[`485] = EIA-485 Interface type

3.2

Data Communications with the Watlow Series 988 Family

Communications Setup, Chapter 3

Chapter 4 Sending Commands

General Message Syntax

As soon as you link the devices, you can talk to the controllers using ASCII characters. They will respond to any Setup or Operation menu prompt, plus some others. The controller will respond to either upper or lower case ASCII characters from your computer.

Both protocol/interface combinations will respond to the general syntax if the commands or queries are correctly transmitted. However, the ANSI X3.28 Protocol requires beginning and ending characters, and the XON/XOFF protocol requires ending characters.

Message Syntax

Messages from your computer to a controller must take this general form.

Command <space> data.1 <space> data.2 <space> data.3... data.N

"Command" is a character string. The brackets "<" and ">" enclose a non-literal

ç

CAUTION: Avoid writing <=> continuously, such as ramping set points or repetitive loops, to the controller's EEPROM memory. Continuous writes may result in premature control failure, system downtime and damage to processes and equipment.

description. The space character, <space> or <sp>, is simply a delimiter, an ASCII space character (hex 20). "Data fields" are prompts and values specific to the command. The number of data fields depends on the particular command. The first argument or parameter is abbreviated, "data.1," the next is "data.2," and so on.

In the syntax explanations that follow, we show you the specific arguments for each command. It will speed the process if you remember this general syntax.

Data Rules

Data fields are prompts and values specific to particular commands. Specific data for each command for each type of controller is listed after this chapter. These rules govern their use:

• Data will include the characters 0 through 9; a decimal point if needed; or a

positive or negative sign.

• Data can include up to seven characters. A "+" or "-" sign, if used, must be first.

• Data can use leading zeros, up to the seven-character limit.

• The data.1 portion of message can be up to four total characters.

Sending Commands, Chapter 4

Command List

These commands, represented by their respective ASCII characters, will enable you to program the controller from your computer. More detailed descriptions of the commands are in Chapters 5, 6 and 7.

? Returns the value of a specific prompt from the controller. = Sets a specific prompt in the controller to a specific value.

Data Communications with the Watlow Series 988 Family

4.1

XON/XOFF

Example Format

This manual presents command examples in a consistent format. Information bracketed by < > indicates a description, rather than literal characters. We show each ASCII character that you must transmit to the controller, including space between the characters. (A <space>, or <sp>, is itself an ASCII character, hex 20).

For instance, in the example below, you want to set the Alarm 2 Low [A2LO] prompt to 500°. Notice how the syntax uses the "=" command.

= <space> A2LO <space> 500 <carriage return>

To send this message, key the ASCII characters into your computer, or write them into your program. Remember, your computer will send the ASCII character string for the number, not an actual number. The hex string for the line looks like this: 3D2041324C4F203530300D.

Notice that we have not mentioned protocol here, or any characters added to this syntax by a protocol. With XON/XOFF, the message above can be transmitted with only an additional carriage return <cr> (hex 0D) character at the end. However, the ANSI X3.28 Protocol requires an envelope of Start of Text <STX> (hex 02) and End of Text <ETX> (hex 03) characters around the information you see above. You will learn how to do that in the following pages.

XON/XOFF Protocol for EIA-232

XON/XOFF (flow control) protocol allows a communicating device (either a

controller or the host) to suspend transmission of all messages from the other device, and then to continue transmission when it's again ready.

The device that needs to suspend transmission sends the XOFF character (hex 13) to stop the other device's transmission, and XON (hex 11) to restart it. Any character will restart the transmission, but to avoid confusion use only the XON character.

Messages transmit according to the syntax described in the XON/XOFF formats that follow for each command.

The XON/XOFF protocol requires a carriage return <cr> character (hex 0D) at the end of every message.

How To Communicate Using XON/XOFF

XON/XOFF protocol is used when one master is networked with only one controller. Your personal computer must generate the master’s messages.

4.2

Data Communications with the Watlow Series 988 Family Sending Commands, Chapter 4

"=" Command Example

ANSI X3.28

ç

CAUTION: Avoid writing <=> continuously, such as ramping set points or repetitive loops, to the controller's EEPROM memory. Continuous writes may result in premature control failure, system downtime and damage to processes and equipment.

Master: Remote:

master must stay off line.)

Remote:

Note: The commands IN1, IN2 and CF may take up to two seconds to return this character. Do not send another message until this character is received.)

“?” Command Example”

Master: Remote:

off-line.)

Remote:

another message once the <cr> is received.)

message.)

For maximum communications speed:

• Do not use a typical delay to wait before looking for a response.

• Scan for returned characters until the correct response is received.

• Use a time out to end a session if a correct response is not received in three

= <sp> A2LO <sp> 500 <cr> (Set the A2LO prompt value to 500.)

<XOFF> (This will be returned once the device starts processing. The

<XON> (Processing is done. The master may send a new message.

? <sp> A2LO <cr> (Request the A2LO prompt value.)

<XOFF> (The remote is preparing the response. The master must stay

<XON> 500 <cr> (The value is returned and the master may send

or <XON> (The message was not understood. The master may send a new

seconds.

How to Communicate Using ANSI X3.28

The ANSI X3.28 protocol provides high quality communications by requiring a response to every message. With a multiple-device or "multidrop" network, this protocol prevents confusion among the separate devices. Furthermore, if noise occurs somewhere in the system, no prompt will change because noise cannot comply with the protocol.

By placing messages inside a protocol envelope, the messages are protected. In the following examples you'll see how this works.

ANSI X3.28 protocol rules:

• Every remote device must have a unique address.

• Only the master can initiate a communication session, by addressing a specific

remote device.

• Every message must be framed with an <STX> (start of transmission) character

and an <ETX> (end of transmission) character.

• The master must wait for the remote device to respond to every message within a

reasonable period. If no response occurs, retry the connection or pursue error recovery.

Sending Commands, Chapter 4

Data Communications with the Watlow Series 988 Family

4.3

ANSI X3.28

Table 4.4 Address to ASCII Conversion for ANSI X3.28 Protocol.

Device Addresses

A Watlow EIA-422 multidrop network can handle up to 10 devices with this protocol. EIA-485 can handle up to 32 devices. Set the address number of the controller with the address prompt [Addr] under the Setup Menu [`SEt].

ASCII

Address Equivalent

00 11 22 33 44 55 66 77 88

99 10 A 11 B 12 C 13 D 14 E 15 F 16 G 17 H 18 I 19 J 20 K 21 L 22 M 23 N 24 O 25 P 26 Q 27 R 28 S 29 T 30 U 31 V

4.4

Data Communications with the Watlow Series 988 Family Sending Commands, Chapter 4

ANSI X3.28

ANSI X3.28 Protocol Example

This example demonstrates communication between a master device and a remote device at address 4. Your personal computer must generate the master’s messages.

Establish Communications Link

Master: Remote:

End Communications Link

Master: Remote:

“=” Command Example

Master: Remote:

Note: The commands IN1, IN2 and CF may take up to 2 seconds to return this character. Do not send another message until this character is received.)

“?” Command Example

Master: Remote:

not send the <EOT> until this character has been received.)

Master: Remote:

send a response until the <ETX> has been received.)

4 <ENQ> (Attempt to link with device 4.) 4 <ACK> (The link is established.)

<DLE> <ENQ> (End data link.)

No response.

<STX> = <sp> A2LO <sp> 500 <ETX> (Set A2LO prompt value to 500.) <ACK> (This will be returned once the unit has completed the value change.

<STX> ? <sp> A2LO <ETX> (Request the A2LO prompt value.) <ACK> (This will be returned once the device has the response ready. Do

or

<NAK> (The command was not understood. Re-send corrected message.) <EOT> (The host gives the device permission to respond.)

<STX> 500 <ETX> (The device sends back the requested value. Do not

Master:

Remote:

until this character has been received.)

For maximum communications speed:

• Do not use a typical delay to wait before looking for a response.

• Scan for returned characters until the correct response is received.

• Use a time out to end a session if a correct response is not received in three seconds.

• Protocols are not flexible. Outside of the <STX> <ETX> framing only the defined

• End the communications link and re-establish it with <DLE> and <ENQ> only when

Sending Commands, Chapter 4

<ACK> (The host received the message correctly.) or

<NAK> (The host did not understand the response.Device will re-send it.) <EOT> (The device returns control to the host. Do not send a new message

Try again later. protocol characters are allowed. Some programming languages add <cr> to the end

of transmissions. This must be disabled. changing to a new device at a different address. The master can communicate

repeatedly with a specific device once the initial data link is established.

Data Communications with the Watlow Series 988 Family

4.5

Modbus RTU

NOTE: Modbus register addresses are listed in the Controller Prompt Table later in this chapter and in the Modbus RTU Address Table at the end of this chapter.

Modbus Remote Terminal Unit (RTU)

Modbus RTU, available on the 988 family of controllers, expands the communications ability of the controller by enabling a computer to read and write directly to registers containing the controller’s parameters.

Because of the wide array of choices available for setting up the 988 family of controllers, only a subset of the prompts contain parameters in a given situation. The Series 982, 988 and 998 User’s Manuals explain the interrelations between prompts. If you try to write to an inactive prompt the controller will return an illegal data address message (02). (See “Exception Responses,” pg. 4.9.)

If you already have a software application that uses Modbus, you can simply skip to the Temperature/process Controller Prompt Table or the Modbus RTU Address Table in this chapter for the address information your program will need. The rest of this section on the Modbus provides information for writing a software application that uses Modbus.

Writing a Modbus Application

You need to code messages in eight-bit bytes, with no parity bit. Negative parameter values must be written in two's complement format. Parameters are stored in twobyte registers accessed with read and write commands to a relative address. Messages are sent in packets that are delimited by a pause at least as long as the time it takes to send 30 bits. To determine this time in seconds, divide 30 by your baud rate.

Because changing some parameters automatically changes or defaults other parameters, use the Complete Parameter Download Sequence table in this chapter to order write commands.

Using a controller address of 0x00 for a write command broadcasts that command to all the controllers in the network. This is a powerful feature if all the controllers on a network use all or most of the same parameters. No response is given to broadcast messages. Be sure to read each control to ensure it has received the command.

4.6

Packet Syntax

Each message packet begins with a one-byte controller address, from 0x01 to 0xF7. The second byte in the message packet identifies the message command: read (0x03 or 0x04); write (0x06 or 0x10); or loop back (0x08).

The next n bytes of the message packet contain register addresses and/or data. The last two bytes in the message packet contain a two-byte Cyclical Redundancy

Checksum (CRC) for error detection.

Packet format: nn | nn | nnnn… | nnnn

∆∆∆∆ ∆∆

address command registers and/or data CRC

Data Communications with the Watlow Series 988 Family Sending Commands, Chapter 4

NOTE: Because the read command can only read 32 registers, the high byte for the number of registers will always be

0.

Modbus RTU

Read Multiple Registers Command (0x03 or 0x04)

This command returns from 1 to 32 registers. Packet sent to controller:| nn | 03 | nnnn | 00 nn | nn nn |

∆∆∆∆∆∆∆∆

controller address (one byte) read command (0x03 or 0x04) starting register high byte starting register low byte number of registers high byte (0x00) number of registers low byte CRC low byte CRC high byte

Packet returned by controller: | nn | 03 | nn | nn nn … nn nn | nn nn |

∆∆∆∆∆∆∆∆∆

controller address (one byte) read command (0x03 or 0x04) number of bytes (one byte) first register data low byte first register data high byte … … register n data high byte register n data low byte CRC low byte CRC high byte

Example (988 only): Read register 0 (model number) of the controller at address 1. Sent: 01 03 00 00 00 01 84 0A Received: 01 03 02 03 DC B9 2D Message: 988 (0x03DC).

Sending Commands, Chapter 4

Example (988 only): Read register 1 and 2 (Process 1 and 2 values) of controller at address 5. Sent: 05 03 00 01 00 02 94 4F Received: 05 03 04 00 64 00 C8 FF BA Message: 100 (0x0064) and 200 (0x00C8).

Write to a Single Register Command (0x06)

This command writes a parameter to a single register. The controller will echo back the command. An attempt to write to a read-only parameter returns an illegal data address error (0x02). (See “Exception Responses,” pg. 4.9.)

∆∆∆∆∆∆∆∆

controller address (one byte) write to a register command (0x06) register high byte register low byte data high byte data low byte CRC low byte CRC high byte

Data Communications with the Watlow Series 988 Family

4.7

Modbus RTU

NOTE: Because the read command can only read 32 registers, the high byte for the number of registers will always be 0.

Example (988 only): Set register 7 (SPI) to 200 (0x00C8) on controller at address 9. Sent: 09 06 00 07 00 C8 38 D5 Received: 09 06 00 07 00 C8 38 D5

Write to Multiple Registers Command (0x10)

This command actually writes a parameter to only a single register. An attempt to write to a read-only parameter returns an illegal data address error (0x02). (See “Exception Responses,” pg. 4.9.)

Packet sent to controller:| nn | 10 | nnnn | 00 01 | 02 | nn nn | nn nn |

∆∆∆∆∆∆∆∆∆∆∆

controller address (one byte) write to multiple registers command (0x10) starting register high byte starting register low byte number of registers to write high byte (0x00) number of registers to write low byte (must be 0x01) number of data bytes (must be 0x02) data high byte data low byte CRC low byte CRC high byte

Packet returned by controller: | nn | 10 | nnnn | 00 01 | nn nn |

∆∆∆∆∆∆∆∆

controller address (one byte) write to multiple registers command (0x10) starting register high byte starting register low byte number of registers to write high byte (0x00) number of registers to write low byte (must be 0x01) CRC low byte CRC high byte

4.8

Loop Back Command (0x08)

This command simply echoes the message. This serves as a quick way to check your wiring.

∆∆∆∆∆∆

controller address (one byte) loop back command (0x08) data high byte data low byte CRC low byte CRC high byte

Example: Run loop back test on controller at address 40 (0x28). Sent: 28 08 55 66 77 88 31 B7 Received: 28 08 55 66 77 88 31 B7

Data Communications with the Watlow Series 988 Family Sending Commands, Chapter 4

Commands

Exception Responses

When a controller cannot process a command it returns an exception response and sets the high bit (0x80) of the command. 0x01 illegal command 0x02 illegal data address 0x03 illegal data value

Packet returned by controller: | nn | nn | nn | nn nn |

∆∆∆∆∆

controller address (one byte) command + 0x80 exception code (0x01 or 0x02 or 0x03) CRC low byte CRC high byte

Messages with the wrong format, timing or CRC are ignored. A read command sent to an inactive parameter returns 0x0000.

Example: Exception 01 - Command 02 is not supported. Sent: 01 02 00 01 00 02 A8 0B Received: 01 82 01 81 60

Example: Exception 02 - The parameter at register 45 (0x002D) is inactive. Sent: 01 06 00 2D 00 01 D8 C3 Received: 01 86 02 C3 A1

Example: Exception 03 - Cannot write 12,000 (0x2EE0) to register 7, out of range, illegal data value. Sent: 01 06 00 07 2E E0 24 23 Received: 01 86 03 02 61

Sending Commands, Chapter 4

Data Communications with the Watlow Series 988 Family

4.9

Commands

Cyclical Redundancy Checksum (CRC) Algorithm

This C routine, calc_crc(), calculates the cyclical redundancy checksum, CRC, for a string of characters. The CRC is the result of dividing the string by 0xA001. Modbus applications calculate the packet’s CRC then append it to the packet.

#define POLYNOMIAL 0xA001; unsigned int calc_crc(unsigned char *start_of_packet, unsigned char

*end_of_packet) {

unsigned int crc; unsigned char bit_count; unsigned char *char_ptr;

/* Start at the beginning of the packet */

char_ptr = start_of_packet;

/* Intitialize CRC */

crc = 0xffff;

NOTE: When the CRC is added to the message packet be sure to put the low byte before the high byte.

/* Loop through the entire packet */

do{

/* Exlusive-OR the byte with the CRC */

crc ^= (unsigned int)*char_ptr;

/* Loop through all 8 data bits */

bit_count = 0; do{

/* If the LSB is 1, shift the CRC and XOR the poynomial mask with the CRC */

if(crc & 0x0001){

crc >>= 1; crc ^= POLYNOMIAL;

}

/

* If the LSB is 0, shift the CRC only */

else{

crc >>= 1;

}

} while(bit_count++ < 7);

} while(char_ptr++ < end_of_packet); return(crc); }

4.10

Data Communications with the Watlow Series 988 Family Sending Commands, Chapter 4

Ramping Controller Prompt Table

Chapter 5 Command Summary of the Series 981-984

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2 Modbus Address

Complete Parameter Download Sequence

When you download a complete set of parameters to a controller, you must load them in this order. The user's manual has more information about prompt interaction.

ç

CAUTION: Entering com-

*IN1 *IN2

RTD1 DFL

*CF

OT1 OT2 OT3 DEC1 RL1 RH1 CAL1 FTR1 RL2

RH2 CAL2 HUNT PRC1 HYS1 PRC2 HYS2 AL2 LAT2 SIL2 AL3 HYS3 LAT3 SIL3

AOUT PRC3 ARL ARH ACAL ERR EI1 EI2 ABSP ANUN LOP HIP ATSP PTYP

GSD POUT IDSP PSTR A2LO A2HI A3LO A3HI PB1 RE1 IT1 RA1 DE1 CT1

PB2 RE2 IT2 RA2 DE2 CT2 DB ENT3 SP1 LOC

mands out of sequence will produce unexpected results, because some prompts change the values of other prompts. Copy this page and use the checkboxes.

Table 5.1 Download Sequence.

981, 982,

983, 984

* Wait at least two seconds after executing this command before going on to the next command.

Command Summary Series 981-984, Chapter 5 Data Communications with the Watlow Series 988 Family

5.1

Ramping Controller Prompt Table

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2

983, 984

Modbus Address

Run/Hold Mode and Prompt Accessibility

Most Series 981-984 prompts are accessible via data communications while the

981, 982,

controller is in its hold mode. Several are accessible when the controller is in either run or hold. A few are accessible only in the run mode. You can monitor the controller’s mode with the RHS command.

ç

CAUTION: Sending the Series 981-984 an invalid prompt for its present mode (run or hold) will result in a data communication error code ER2. Use the RHS prompt to monitor the controller mode.

Table 5.2 Run/Hold Mode Commands.

Table 5.2 identifies the prompts accessible in run or hold, and those available in run only. Others not specifically identified are accessible in the hold mode only.

RUN Only Mode RUN or HOLD MODE

? CSP ? ALM ? EJC ? C1 ? ENSP ? C2 ? MTR* ? ENT3 = HOLD 1 ? ENT4

Resetting the communication parameters is valid only in the hold mode. * This command is accessible only in the run mode for software revisions before and including REV H. ** These commands are accessible in the run and hold modes for software revisions after and including REV I.

? ER ? ER2 ? RHS ? SP1 ? DEV** ? MTR** ? PWR** = MOD x = SP1

5.2

Data Communications with the Watlow Series 988 Family Command Summary Series 981-984, Chapter 5

Ramping Controller Prompt Table

Command Summary Series 981-984 Data Communications

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2 Modbus Address

A2HI Output 2 Alarm High ? <sp> A2HI <cr> Process: A2LO to sensor high range

322 = <sp> A2HI <sp> data.2 <cr> Deviation: 0 to 9999°

A2LO Output 2 Alarm Low ? <sp> A2LO <cr> Process: sensor low range to A2HI 321 = <sp> A2LO <sp> data.2 <cr> Deviation: -999 to 0°

A3HI Output 3 Alarm High ? <sp> A3HI<cr> Process: A3LO to sensor high range 341 = <sp> A3HI <sp> data.2 <cr> Deviation: 0 to 9999°

A3LO Output 3 Alarm Low ? <sp> A3LO <cr> Process: sensor low range to A3HI 340 = <sp> A3LO <sp> data.2 <cr> Deviation: -999 to 0°

ABSP Abort Set Point ? <sp> ABSP <cr> off 1211 = <sp> ABSP <sp> data.2 <cr> RL to RH

ACAL Calibration Offset for ? <sp> ACAL <cr> -999°F to 999°F 746 Retransmit Output = <sp> ACAL <sp> data.2 <cr> -555°C to 555°C

AL2 Alarm 2 Type ? <sp> AL2 <cr> 0 = Process Alarm, Input 1 719 = <sp> AL2 <sp> data.2 <cr> 1 = Deviation Alarm, Input 1

AL3 Alarm 3 Type ? <sp> AL3 <cr> 0 = Process Alarm, Input 1 736 = <sp> AL3 <sp> data.2 <cr> 1 = Deviation Alarm, Input 1

ALM Alarm Status ? <sp> ALM <cr> 0 = No alarms occurring (0000 0000) 106 (Writing a 0 clears = <sp> ALM <sp> 0 <cr> Bit 1 = A2LO (0000 0001) or next alarm.) Bit 2 = A2HI (0000 0010) 110 Bit 3 = A3LO (0000 0100)

AMB Ambient Terminal ? <sp> AMB <cr> Input 1 terminals in 0.0°F 1500 Temperature

Rate: 0 to 9999°/minute Default: RH, 999°, or 999°/min.

Rate: -999 to 0°/minute Default: RL, -999°, or -999°/min.

Rate: 0 to 9999°/minute Default: RH, 999°, or 999°/min.

Rate: -999 to 0°/minute Default: RL, -999°, or -999°/min.

999 to 999 units Default: 0°F, 0°C, or 0 units

2 = Rate Alarm, Input 1 Default: 0

Bit 4 = A3HI (0000 1000) 106 = Alarm 2

0 = off 1 = HI 2 = LO

110 = Alarm 3

0 = off 1 = HI 2 = LO

Table 5.3 -

A2HI to AMB

ç

CAUTION: Avoid writing <=> continuously, such as ramping set points or repetitive loops, to the Series 981-984 EEPROM memory. Continuous writes may result in premature control failure, system downtime and damage to processes and equipment.

NOTE: The number of decimal places returned by many of these commands is determined by the DEC1 or IN1 setting. (This does not apply to Modbus Protocol.)

981, 982,

983, 984

Command Summary Series 981-984, Chapter 5 Data Communications with the Watlow Series 988 Family

5.3

Ramping Controller Prompt Table

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2

983, 984

Table 5.4 -

ANUN to DE1

981, 982,

ç

CAUTION: Avoid writing <=> continuously, such as ramping set points or repetitive loops, to the Series 981-984 EEPROM memory. Continuous writes may result in premature control failure, system downtime and damage to processes and equipment.

NOTE: The number of decimal places returned by many of these commands is determined by the DEC1 or IN1 setting. (This does not apply to Modbus Protocol.)

Modbus Address

ANUN Alarm Annunciation ? <sp> ANUN <cr> 0 = off

725 = <sp> ANUN <sp> data.2 <cr> 1 = on

AOUT Analog Output 3 ? <sp> AOUT <cr> 0 = Retransmit Process Input 1 743 Retransmit Function = <sp> AOUT <sp> data.2 <cr> 1 = Retransmit Set Point 1

ARH Retransmit ? <sp> ARH <cr> ARL to 9999 745 Range High = <sp> ARH <sp> data.2 <cr> Default: RH1 or RH2 per AOUT

ARL Retransmit ? <sp> ARL <cr> -999 to ARH 744 Range Low = <sp> ARL <sp> data.2 <cr> Default: RL1 or RL2 per AOUT

ATSP Auto-tune ? <sp> ATSP <cr> 50 to 150% 304 Set Point % = <sp> ATSP <sp> data.2 <cr> Default: 90%

AUT Auto-tune ? <sp> AUT <cr> 0 = No auto-tuning 305 = <sp> AUT <sp> data.2 <cr> 1 = Tune PID

C1 Input 1 Value ? <sp> C1 <cr> Based on IN1 range ; RL1 to RH1 100

C2 Input 2 Value ? <sp> C2 <cr> Based on IN2 range ; RL2 to RH2 104

CAL1 Input 1 Calibration ? <sp> CAL1 <cr> -999°F to 999°F 605 Offset = <sp> CAL1 <sp> data.2 <cr> -555°C to 555°C

CAL2 Input 2 Calibration ? <sp> CAL2 <cr> -999°F to 999°F 615 Offset = <sp> CAL2 <sp> data.2 <cr> -555°C to 555°C

CF Degrees Select ? <sp> CF <cr> 0 = Display °F 901 Display Loop = <sp> CF <sp> data.2 <cr> 1 = Display °C

CSP Current Profile ? <sp> CSP <cr> RL1 to RH1 1202 Set Point

CT1 Cycle Time ? <sp> CT1 <cr> S.S. relay or open col: 506 Output 1 = <sp> CT1 <sp> data.2 <cr> 0.0 = Burst firing, or

CT2 Cycle Time ? <sp> CT2 <cr> S.S. relay or open col: 516 Output 2 = <sp> CT2 <sp> data.2 <cr> 0.0 = Burst firing, or

DATE Factory Test Date ? <sp> DATE <cr> xxyy 5 xx = week

DB Dead Band PID ? <sp> DB <cr> -999°F to 999°F 505 Heat/Cool = <sp> DB <sp> data.2 <cr> -555°C to 555°C

DE1 Derivative ? <sp> DE1 <cr> 0.00 to 9.99 minutes 503 Output 1 PID = <sp> DE1 <sp> data.2 <cr> Default: 0.00

Default: on

2 = off 3 = Retransmit Process Input 2 Default: 0

Default: off

-999 units to 999 units Default: 0

Default: 0

0.1 to 999.9 sec. (time prop) Mech relay: 5.0 to 999.9 sec. Default: 1.0 or 10.0 sec.

yy = year

-999 units to 999 units Default: 0°F, 0°C, or 0 units

5.4

Data Communications with the Watlow Series 988 Family Command Summary Series 981-984, Chapter 5

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2 Modbus Address

Ramping Controller Prompt Table

981,

982,

983,

984

Command Summary Series 981-984, Chapter 5 Data Communications with the Watlow Series 988 Family

5.5

DE2 Derivative ? <sp> DE2<cr> 0.00 to 9.99 minutes 513 Output 2 PID = <sp> DE2 <sp> data.2 <cr> Default: 0.00

DEC1 Decimal Point ? <sp> DEC1 <cr> 0 = Decimal point 0

606 Process Input 1 = <sp> DEC1 <sp> data.2 <cr> 1 = Decimal point 0.0

2 = Decimal point 0.00 3 = Decimal point 0.000 Default: 0

DEV Process Deviation ? <sp> DEV <cr> Difference between SP1 and C1 211 Display Loop (IN 1)

DFL Default Unit Type ? <sp> DFL <cr> 0 = US units 900 = <sp> DFL <sp> data.2 <cr> 1 = Standard international units

EI1 Event Input 1 ? <sp> EI1 <cr> 0 = None 1060 Function = <sp> EI1 <sp> data.2 <cr> 1 = Lock out keyboard

2 = Alarm reset 3 = Turn control outputs off 4 = Hold profile 5 = Start file 1 6 = Start file 2 7 = Start file 3 8 = Start file 4 9 = ABSP 10 = Pause 11 = Waitfor Event Default: 0

EI1S Event Input 1 Status ? <sp> EI1S <cr> 0 = Open (off) 201 1 = Closed (on)

EI2 Event Input 2 ? <sp> EI2 <cr> 0 = None 1062 Function = <sp> EI2 <sp> data.2 <cr> 1 = Lock out keyboard

2 = Alarm reset 3 = Turn control outputs off 4 = Hold profile 5 = Start file 1 6 = Start file 2 7 = Start file 3 8 = Start file 4 9 = ABSP 10 = Pause 11 = Waitfor Event Default: 0

EI2S Event Input 2 Status ? <sp> EI2S <cr> 0 = Open (off) 213 1 = Closed (on)

EJC Elapsed Jump ? <sp> EJC <cr> 0 to 255 1203 Count

ENSP End Set Point ? <sp> ENSP <cr> RL1 to RH1 1204

ENT3 Event 3 Output State ? <sp> ENT3 <cr> 0 = off 1268 = <sp> ENT3 <sp> data.2 <cr> 1 = on

ER Error, Analog Input ? <sp> ER <cr> 0 = No error 209 (Multiple errors 1 = Input 1 A-D overflow

possible.) 2 = Input 1 overrange

3 = Input 1 underrange 4 = Input 1 A-D underflow 5 = Input 2 A-D overflow 6 = Input 2 overrange 7 = Input 2 underrange 8 = Input 2 A-D underflow 9 = Ambient error

Table 5.5 -

DE2 to ER

ç

CAUTION: Avoid writing <=> continuously, such as ramping set points or repetitive loops, to the Series 981-984 EEPROM memory. Continuous writes may result in premature control failure, system downtime and damage to processes and equipment.

NOTE: The number of decimal places returned by many of these commands is determined by the DEC1 or IN1 setting. (This does not apply to Modbus Protocol.)

Ramping Controller Prompt Table

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2

983, 984

Table 5.6 -

ER2 to HYS3

Modbus Address

ER2 Error, ? <sp> ER2 <cr> 0 = No error n/a Communications 1 = Transmit buffer overflow

981, 982,

ç

CAUTION: Avoid writing <=> continuously, such as ramping set points or repetitive loops, to the Series 981-984 EEPROM memory. Continuous writes may result in premature control failure, system downtime and damage to processes and equipment.

NOTE: The number of decimal places returned by many of these commands is determined by the DEC1 or IN1 setting. (This does not apply to Modbus Protocol.)

ERR Error, ? <sp> ERR <cr> 0 = Errors latching 607 Latching Enable = <sp> ERR <sp> data.2 <cr> 1 = Errors non-latching

FTR1 Filter Time Constant ? <sp> FTR1 <cr> -60 to 60 seconds 604 Process Input 1 = <sp> FTR1 <sp> data.2 <cr> Default: 0

GSD Guaranteed Soak ? <sp> GSD <cr> 0°F to 999°F 1205 Deviation = <sp> GSD <sp> data.2 <cr> 0°C to 999°C

HIP High Power Limit ? <sp> HIP <cr> LOP (%) to 100%

714 = <sp> HIP <sp> data.2 <cr> Default: 100 (heat/cool)

HOLD Simulate HOLD = <sp> HOLD <sp> data.2 <cr> 1 = Holds current file# and step# 1210 Key Press

HUNT Slidewire ? <sp> HUNT <cr> 0.1% to 100.0% 1905 Dead Band % = <sp> HUNT <sp> data.2 <cr> Default: 1.0%

HYS1 Output 1 Hysteresis ? <sp> HYS1 <cr> 0°F to 999°F 507 = <sp> HYS1 <sp> data.2 <cr> 0°C to 555°C

HYS2 Output 2 Hysteresis ? <sp> HYS2 <cr> 0°F to 999°F 517 = <sp> HYS2 <sp> data.2 <cr> 0°C to 555°C 720 0 units to 999 units

HYS3 Output 3 Hysteresis ? <sp> HYS3 <cr> 0°F to 999°F 737 = <sp> HYS3 <sp> data.2 <cr> 0°C to 555°C

2 = Receive buffer overflow 3 = Framing error 4 = Overrun error 5 = Parity error 6 = Talking out of turn 7 = Invalid reply error 8 = Noise error 20 = Command not found 21 = Prompt not found 22 = Incomplete command line 23 = Invalid character 24 = Number of chars. overflow 25 = Input out of limit 26 = Read only command 27 = Write allowed only 28 = Prompt not active 30 = Request to RUN invalid 31 = Request to HOLD invalid 32 = Command invalid in RUN Mode 33 = Command invalid in HOLD Mode 34 = Output 3 is not an Event 35 = Output 4 is not an Event 38 = Asterisk not allowed 39 = Infinite loop error

Default: 1

0 to 999 units 0 = (disabled) Default: 0°F, 0°C, or 0 units

Default: 0 (cool only)

0 units to 999 units Default: 3°F, 2°C, or 3 units

Default: 3°F, 2°C, or 3 units

0 units to 999 units Default: 3°F, 2°C, or 3 units

5.6

Data Communications with the Watlow Series 988 Family Command Summary Series 981-984, Chapter 5

Ramping Controller Prompt Table

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2 Modbus Address

IDSP Idle Set Point ? <sp> IDSP <cr> RL1 to RH1 308 After Power Outage = <sp> IDSP <sp> data.2 <cr>

IN1 Input 1 Type ? <sp> IN1 <cr> 1 = J t/c; 32 to 1500°F/0 to 816°C

601 = <sp> IN1 <sp> data.2 <cr> 2 = K t/c; -328 to 2500°F/-200 to 1371°C

3 = T t/c; -328 to 750°F/-200 to 399°C 4 = N t/c; 32 to 2372°F/0 to 1300°C 5 = E t/c; -328 to 1470°F/-200 to799°C 6 = C t/c (W3); 32 to 4200°F 0 to2316°C 7 = D t/c (W5); 32 to 4200°F/0 to2316°C 8 = Pt 2; 32 to 2543°F/0 to 1395°C 10 = R t/c; 32 to 3200°F/0 to 1760°C 11 = S t/c; 32 to 3200°F/0 to 1760°C 12 = B t/c; 1598 to 3300°F/870 to 1816°C

Caution: Writing to IN1 or IN2 resets most 14 = 1° RTD (DIN); -328 to 1472°F/-200 to 800°C prompts to their default values. 15 = 0.1° RTD (DIN); -99.9 to 999.9°F/-99.9 to 700.0°C

17 = 4-20mA; -999 to 9999 units 18 = 0-20mA; -999 to 9999 units 19 = 0-5VÎ (dc); -999 to 9999 units 20 = 1-5VÎ (dc); -999 to 9999 units 21 = 0-10VÎ (dc); -999 to 9999 units 23 = 0-50mVÎ (dc); -999 to 9999 units 24 = 0-100mVÎ (dc); -999 to 9999 units

IN2 Input 2 Type ? <sp> IN2 <cr> 26 = Slidewire off 611 = <sp> IN2 <sp> data.2 <cr> 27 = Slidewire; 100 to 1200

32 = Event input 2 off 33 = Event Input 2 on

IT1 Integral for Output 1 ? <sp> IT1 <cr> 0.00 to 99.99 minutes per repeat 501 = <sp> IT1 <sp> data.2 <cr> Default: 10.00 minutes per repeat

IT2 Integral for Output 2 ? <sp> IT2 <cr> 0.00 to 99.99 minutes per repeat 511 = <sp> IT2 <sp> data.2 <cr> Default: 10.00 minutes per repeat

ITY1 Input 1 ? <sp> ITY1 <cr> 0 = None 8 Hardware Type 1 = t/c only

4 = Input off 5 = Universal RTD 6 = Universal high gain t/c 7 = Universal low gain t/c 8 = Universal millivolts 9 = Universal process

ITY2 Input 2 ? <sp> ITY2 <cr> 0 = None 9 Hardware Type 3 = Slidewire

4 = Input off 10 = Event input

LAT2 Alarm 2 Latching ? <sp> LAT2 <cr> 0 = Latching alarms 721 = <sp> LAT2 <sp> data.2 <cr> 1 = Non-latching alarms

Default: 1

LAT3 Alarm 3 Latching ? <sp> LAT3 <cr> 0 = Latching alarms 738 = <sp> LAT3 <sp> data.2 <cr> 1 = Non-latching alarms

Default: 1

Table 5.7 -

IDSP to LAT3

ç

CAUTION: Avoid writing <=> continuously, such as ramping set points or repetitive loops, to the Series 981-984 EEPROM memory. Continuous writes may result in premature control failure, system downtime and damage to processes and equipment.

NOTE: The number of decimal places returned by many of these commands is determined by the DEC1 or IN1 setting.

NOTE: (RTD setting) For JIS curve, go to rtd1 prompt after selecting In1.

981, 982,

983, 984

Command Summary Series 981-984, Chapter 5 Data Communications with the Watlow Series 988 Family

5.7

Ramping Controller Prompt Table

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2

983, 984

Table 5.8 -

LOC to OT3

981, 982,

ç

CAUTION: Avoid writing <=> continuously, such as ramping set points or repetitive loops, to the Series 981-984 EEPROM memory. Continuous writes may result in premature control failure, system downtime and damage to processes and equipment.

NOTE: The number of decimal places returned by many of these commands is determined by the DEC1 or IN1 setting. (This does not apply to Modbus Protocol.)

Modbus Address

LOC Keyboard Lockout ? <sp> LOC <cr> 0 = No lockout

1300 = <sp> LOC <sp> data.2 <cr> 1 = Lock out PID Menu and auto-tune

LOP Low Power Limit ? <sp> LOP <cr> -100% to HiP (%) 715 = <sp> LOP <sp> data.2 <cr> Default: -100% (heat/cool)

LRNH Learn High Slide- ? <sp> LRNH <cr> 0 = No function 1907 wire Resistance = <sp> LRNH <sp> data.2 <cr> 1 = Learn

LRNL Learn Low Slide- ? <sp> LRNL <cr> 0 = No function 1906 wire Resistance = <sp> LRNL <sp> data.2 <cr> 1 = Learn

MDL Model Number ? <sp> MDL <cr> 982 (981-984 ramping unit) 0

MOD Mode Key Action = <sp> MOD <sp> data.2 <cr> 0 = Mode to previous prompt 1900 1 = Mode to next prompt

MTR Monitor the ? <sp> MTR <cr> See Key Command, "MTR," at the 1200 currently running end of this chapter for full response

step. syntax.

This key command

responds with all

step information for

these step types:

• Set Point (time)

• Set Point (rate)

• Soak

These step types

have zero-time

duration; they will

never respond

to an MTR query:

• Jump-loop

• Link File

• End Step

OT1 Output 1 Action ? <sp> OT1 <cr> 0 = Heat 700 = <sp> OT1 <sp> data.2 <cr> 1 = Cool

OT2 Output 2 Action ? <sp> OT2 <cr> 0 = Heat 717 = <sp> OT2 <sp> data.2 <cr> 1 = Cool

OT3 Output 3 Action ? <sp> OT3 <cr> 0 = None 734 = <sp> OT3 <sp> data.2 <cr> 1 = Alarm 3

prompt

2 = Lock out System, PID and Program

Menus

3 = Lock out System, PID and Program

Menus; and set point 1 slewing

Default: 0

Default: 0% (heat only)

Default: 0

2 = None 3 = Alarm 2 4 = Alarm 2 reverse acting

2 = Alarm 3 reverse acting 3 = Event 3 (ENT3)

5.8

Data Communications with the Watlow Series 988 Family Command Summary Series 981-984, Chapter 5

Ramping Controller Prompt Table

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2 Modbus Address

OTY1 Output 1 Hardware ? <sp> <OTY1> <cr> 0 = None

16 OTY2 Output 2 Hardware ? <sp> <OTY2> <cr> 1 = SSR 0.5A 17 OTY3 Output 3 Hardware ? <sp> <OTY3> <cr> 2 = SSR 0.5A with suppression 18 OTY4 Output 4 Hardware ? <sp> <OTY4> <cr> 5 = Dual SSR form A 19 6 = Switched dc

7 = Dual switched dc 8 = Relay 5A form C 9 = Relay 5A form C with suppression 10 = Relay 5A form A/B 11 = Relay 5A form A/B with suppr. 12 = Dual Relay form A 13 = Process output 14 = Voltage retransmit 15 = Current retransmit 16 = Power supply 17 = Comms EIA-232 18 = Comms EIA-485 / EIA-422 19 = Comms EIA-485 / EIA-232

PB1 Proportional Band ? <sp> PB1 <cr> if DFL = 0 and CF = 1, then 0 to 555°C 500 Output 1 = <sp> PB1 <sp> data.2 <cr> if DFL = 0 and CF = 0, then 0 to 999°F

if DFL = 0 and In1 = a process value, then 0 to 999 units if DFL = 1, then 0.0 to 99.9% of span Default: 25°F, 14°C, 25 units, or 3.0%

PB2 Proportional Band ? <sp> PB2 <cr> if DFL = 0 and CF = 1, then 0 to 555°C 510 Output 2 = <sp> PB2 <sp> data.2 <cr> if DFL = 0 and CF = 0, then 0 to 999°F

if DFL = 0 and In1 = a process value, then 0 to 999 units if DFL = 1, then 0.0 to 99.9% of span Default: 25°F, 14°C, 25 units, or 3.0%

POUT Power Outage ? <sp> POUT <cr> 0 = Continue 1206 Response = <sp> POUT <sp> data.2 <cr> 1 = Hold (HOLD)

2 = Abort 3 = Idle set point (IDSP) 4 = Reset

PRC1 Process Range ? <sp> PRC1 <cr> 0 = 4-20mA 701 Output 1 = <sp> PRC1 <sp> data.2 <cr> 1 = 0-20mA

2 = 0-5V 3 = 1-5VÎ (dc) 4 = 0-10VÎ (dc) Default: 0

PRC2 Process Range ? <sp> PRC2 <cr> 0 = 4-20mA 718 Output 2 = <sp> PRC2 <sp> data.2 <cr> 1 = 0-20mA

2 = 0-5VÎ (dc) 3 = 1-5VÎ (dc) 4 = 0-10VÎ (dc) Default: 0

PRC3 Process Range ? <sp> PRC3 <cr> 0 = 4-20mA 735 Output 3 = <sp> PRC3 <sp> data.2 <cr> 1 = 0-20mA

2 = 0-5VÎ (dc) 3 = 1-5VÎ (dc) 4 = 0-10VÎ (dc) Default: 0

PSTR Program Start Point ? <sp> PSTR <cr> 0 = Start @ current process value 1207 = <sp> PSTR <sp> data.2 <cr> 1 = Start @ hold mode set point

Default: 1

Table 5.9 -

OTY1 to PSTR

ç

CAUTION: Avoid writing <=> continuously, such as ramping set points or repetitive loops, to the Series 981-984 EEPROM memory. Continuous writes may result in premature control failure, system downtime and damage to processes and equipment.

NOTE: The number of decimal places returned by many of these commands is determined by the DEC1 or IN1 setting. (This does not apply to Modbus Protocol.)

981, 982,

983, 984

Command Summary Series 981-984, Chapter 5 Data Communications with the Watlow Series 988 Family

5.9

Ramping Controller Prompt Table

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2

983, 984

Table 5.10 -

PTYP to SOFT

981, 982,

ç

CAUTION: Avoid writing <=> continuously, such as ramping set points or repetitive loops, to the Series 981-984 EEPROM memory. Continuous writes may result in premature control failure, system downtime and damage to processes and equipment.

NOTE: The number of decimal places returned by many of these commands is determined by the DEC1 or IN1 setting. (This does not apply to Modbus Protocol.)

Modbus Address

PTYP Program Type; ? <sp> PTYP <cr> 0 = Time-based; hour:min:sec 1208 Time-based, or = <sp> PTYP <sp> data.2 <cr> 1 = Ramp rate-based; °/minute

Ramp rate-based Default: 0

PWR Percent Power ? <sp> PWR <cr> -100% to 100% 103 Present Output Default: n/a

RA1 Rate Output 1 ? <sp> RA1 <cr> 0.00 to 9.99 minutes

504 = <sp> RA1 <sp> data.2 <cr> Default: 0.00 RA2 Rate Output 2 ? <sp> RA2 <cr> 0.00 to 9.99 minutes

514 = <sp> RA2 <sp> data.2 <cr> Default: 0.00 RE1 Reset Output 1 ? <sp> RE1 <cr> 0.00 to 9.99 repeats/min.

502 = <sp> RE1 <sp> data.2 <cr> Default: 0.10 repeats/min. RE2 Reset Output 2 ? <sp> RE2 <cr> 0.00 to 9.99 repeats/min.

512 = <sp> RE2 <sp> data.2 <cr> Default: 0.10 repeats/min. RESU Resume a Program = <sp> RESU <sp> data.2 <cr> 1 = Resumes current file# and step#

1209 RH1 Range High ? <sp> RH1 <cr> min. IN1 range to max. IN1 range

603 Input 1 = <sp> RH1 <sp> data.2 <cr> Default: sensor high range RH2 Range High ? <sp> RH2 <cr> min. IN2 range to max. IN2 range

613 Input 2 = <sp> RH2 <sp> data.2 <cr> Default: sensor high range RHS Run/Hold Status ? <sp> <RHS> <cr> 0 = Hold

200 1 = Run

RL1 Range Low ? <sp> RL1 <cr> min. IN1 range to max. IN1 range 602 Input 1 = <sp> RL1 <sp> data.2 <cr> Default: sensor low range

RL2 Range Low ? <sp> RL2 <cr> min. IN2 range to max. IN2 range 612 Input 2 = <sp> RL2 <sp> data.2 <cr> Default: sensor low range

RTD1 RTD Calibration ? <sp> RTd1 <cr> 0 = JIS 609 Curve Input 1 = <sp> RTd1 <sp> data.2 <cr> 1 = DIN

SIL2 Alarm 2 Silence ? <sp> SIL2 <cr> 0 = off/disabled 722 = <sp> SIL2 <sp> data.2 <cr> 1 = on/enabled

SIL3 Alarm 3 Silence ? <sp> SIL3 <cr> 0 = off/disabled 739 = <sp> SIL3 <sp> data.2 <cr> 1 = on/enabled

SRNB Serial Number ? <sp> SRNB <cr> xxxx = 2 Bottom Display 0000 to 9999

Read the six-digit

unit serial number

in two segments,

SNxx and xxxx,

i.e., upper and lower

front panel displays.

SRNT Serial Number ? <sp> SRNT <cr> SNxx = 1 Top Display 00 to 99

SOFT Software Revision ? <sp> SOFT <cr> 0 = Rev A 8 = Rev I 4 1 = Rev B 9 = Rev J

2 = Pre-run

Default: 1

Default: 0

2 = Rev C 10 = Rev K 3 = Rev D 11 = Rev L 4 = Rev E 12 = Rev M 5 = Rev F 13 = Rev N

6 = Rev G etc..........

7 = Rev H

5.10

Data Communications with the Watlow Series 988 Family Command Summary Series 981-984, Chapter 5

Ramping Controller Prompt Table

981,

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2 Modbus Address

SP1 Set Point 1 ? <sp> SP1 <cr> RL1 to RH1

300 = <sp> SP1 <sp> data.2 <cr> Default: per IN1 and hardware

set SP1 to RL1-1 to turn all outputs off

SHYS Slidwire ? <sp> SHYS <cr> 0 to Hunt 1904 Hysteresis = <sp> SHYS <sp> data.2 <cr>

STP Program a File Step. ? <sp> <STP> <sp> <FILE> <cr> Read: This key command = <sp> <STP> <sp> <FILE> data.2 <sp> ... data.n <cr> 1201 programs or queries Write: all step information See Key Command, "STP," at 1250 for all step types: the end of this chapter for full

• Set Point (time) syntax and data. See p. 5.14

• Set Point (rate)

• Soak

• Jump-loop

• Link File

• End

STRT Start a File = <sp> STRT <sp> data.2 <sp> data.3 <sp> 1250

data.2 data.3 1 = File 1 1 = Step 1 2 = File 2 2 = Step 2 3 = File 3 3 = Step 3 4 = File 4 4 = Step 4

5 = Step 5 6 = Step 6

TOUT Test Outputs = <sp> TOUT <sp> data.2 <cr> 0 = All off 1514 1 = Output 1 on

2 = Output 2 on 3 = Output 3 on 4 = Output 4 on

982, 983, 984

Table 5.11 -

SP1 to TOUT

ç

CAUTION: Avoid writing <=> continuously, such as ramping set points or repetitive loops, to the Series 981-984 EEPROM memory. Continuous writes may result in premature control failure, system downtime and damage to processes and equipment.

NOTE: The number of decimal places returned by many of these commands is determined by the DEC1 or IN1 setting. (This does not apply to Modbus Protocol.)

Command Summary Series 981-984, Chapter 5 Data Communications with the Watlow Series 988 Family

5.11

Ramping Controller MTR Command

Vertical lines represent <space> characters. Final vertical line represents a <space> and a <carriage return>. Each field must have data.

data.11data.10data.9data.8data.6data.5data.4 data.7data.3data.2data.1

Monitor the Current Step for Current Process Information; response will parallel step type syntax below.

? MTR

982, 983, 984

981,

(Query current step info)

MTR Response for a Set Point Step, Time-based (PTYP = TI) Syntax

<FILE#>

1 to 4

MTR Response for a Set Point Step, Ramp Rate-based (PTYP = RATE) Syntax

<FILE#>

1 to 4

MTR Response for a Soak Step Syntax

<FILE#>

1 to 4

Note: MTR responses for Jump-loop, Link File and End Steps do not exist. These are zero time steps. The MTR will wait for next available set point or soak step type information.

<STEP#>

1 to 6

<STEP#>

1 to 6

<STEP#>

1 to 6

<STYP>

(Step Type) 1= SP (Set Point)

<STYP>

(Step Type) 1= SP (Set Point)

<STYP>

(Step Type) 2= SOAH (Soak)

<SP>

RL to RH DFLT: 75°F/ 25°C/75 units, or RL if > the above.

<SP>

RL to RH DFLT: 75°F/ 25°C/75 units, or RL if > the above.

<HOUR>

0 to 99

<HOUR>

0 to 99

<RATE>

0 to 360°F, 0 to 200°C, or 0 to 360 units

<MIN>

0 to 59

<MIN>

0 to 59

<ENT3>

(Event 3 Status)

"*"= disabled or unavailable

0=off 1=on

<SEC>

0 to 59

<SEC>

0 to 59

<ENT4>

(Event 4 Status)

"*"= disabled or unavailable

<ENT3>

(Event 3 Status)

"*"= disabled

or

unavailable

0=off 1=on

<ENT3>

(Event 3 Status)

"*"= disabled or unavailable

0=off 1=on

<ENT4>

(Event 4 Status)

"*"= disabled or unavailable

<ENT4>

(Event 4 Status)

"*"= disabled or unavailable

NOTE: You must send an "*" if disabled or unavailable.

<WE>

(Wait for Event)

"*"= disabled or unavailable

0=off 1=on

<WPR>

(Wait for Process)

"*"= disabled or unavailable

Range: RL1 to RH1

Table 5.12 -

Key Command, MTR.

5.12

Data Communications with the Watlow Series 988 Family Command Summary Series 981-984, Chapter 5

ç

CAUTION: Excessive use of the Monitor (MTR) command can slow Series 981-984 input sampling and output update rates. Avoid sending the MTR command more than once every five seconds.

ç

CAUTION: Avoid writing (=) continuously, such as ramping set points or repetitive loops, to the Series 981-984 EEPROM memory. Continuous writes may result in premature control failure, system downtime and damage to processes and equipment.

Ramping Controller STP Command

981,

Vertical lines represent <space> characters. Final vertical line represents a <space> and a <carriage return>. Each field must have data.

data.11data.10data.9data.8data.6data.5data.4 data.7data.3data.2data.1

Query any Step for Programmed Information; response will parallel step type syntax below.

? STP

(Query step info)

Program any Step per the Step Types below. Set Point Step, Time-based (PTYP = TI) Syntax

= STP

(Program a step)

Set Point Step, Ramp Rate-based (PtyP = rAtE) Syntax

= STP

(Program a step)

<FILE#>

1 to 4

1 to 4

<FILE#>

1 to 4

<STEP#>

1 to 6

<STEP#>

1 to 6

<STEP#>

1 to 6

<STYP>

(Step Type) 1= SP (Set Point)

<STYP>

(Step Type) 1= SP (Set Point)

<SP>

RL to RH DFLT: 75°F/ 25°C/ 75 units

<SP>

RL to RH DFLT: 75°F/ 25°C/ 75 units

<HOUR>

0 to 23

<RATE>

0 to 360°F, 0 to 200°C or 0 to 360 units

<MIN>

0 to 59

<ENT3>

(Event 3 Status)

"*"= disabled or unavailable

0=off 1=on

<SEC>

0 to 59

<ENT4>

(Event 4 Status)

"*"= disabled or unavailable

<ENT3>

(Event 3 Status)

"*"= disabled or unavailable

0=off 1=on

<ENT4>

(Event 4 Status)

"*"= disabled or unavailable

NOTE: You must send an "*" if disabled or unavailable.

982, 983, 984

Soak Step Syntax

= STP

(Program a Step)

Jump-loop Step Syntax

= STP

(Program a Step)

Link File Step Syntax

= STP

(Program a Step)

<FILE#>

1 to 4

<FILE#>

1 to 4

<FILE#>

1 to 4

<STEP#>

1 to 6

<STEP#>

1 to 6

<STEP#>

1 to 6

<STYP>

(Step Type) 2= SOAH (Soak)

<STYP>

(Step Type) 3= JL (Jumploop)

<STYP>

(Step Type) 4= LFIL (Link File)

<HOUR>

0 to 23

<JF>

(Jump to File) 1 to 4 DFLT: current file

<LFIL>

1 = FIL1 2 = FIL2 3 = FIL3 4 = FIL4

<MIN>

0 to 59

<JS>

(Jump to Step) 1 to 5 DFLT: 1 Must be lower than current step #.

<SEC>

0 to 59

<JC>

(Jump Count) Repeat 0 to 255 times 0 = infinite counts

<ENT3>

(Event 3 Status)

"*"= disabled or unavailable

0=off 1=on

Table 5.13 -

Key Command, STP.

<ENT4>

(Event 4 Status)

"*"= disabled or unavailable

<WE>

(Wait for Event)

"*"= disabled or unavailable

0=DSBL 1=on 2=off

<WPR>

(Wait for Process)

"*"= disabled or unavailable

Range: RL1 to RH1; (RLI-1) =DSBL

End Step Syntax

= STP

(Program a Step)

Command Summary Series 981-984, Chapter 5

<FILE#>

1 to 4

<STEP#>

1 to 6

<STYP>

(Step Type) 0= End

<END>

(End Status) 0 = Hold 1 = off

Data Communications with the Watlow Series 988 Family

5.13

Ramping Controller Commands

MONITOR (MTR) Command

READ only

982, 983, 984

Register: 1200 (You must request 23 registers)

NOTE: "*" means the

981,

parameter is not available. The value will be -9999.

MTR response for a Set Point Step, Time-based(PTYP = TI)

Register # 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 Parameter File Step Type SP Hour Min Sec ****

MTR response for a Set Point Step, Rate-based(PTYP = RATE)

Register # 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 Parameter File Step Type SP * * * Rate * * *

MTR response for a Soak Step

Register # 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 Parameter File Step Type * Hour Min Sec ****

START (STRT) Command

WRITE only

Register: 1250 1251 1252 Value: 1 File # Step #

SET command, sets the current profile FILE and STEP.

WRITE only

Register: 1250 1251 1252 Value: 3 File # Step #

STEP (STP) Command

READ the current file and step

Register: 1201 (You must request 23 registers) Response will be the same as the PROGRAM commands below, (1201 = 1251, 1202 = 1252 etc.)

WRITE (program) the specified file and step.

(You must send a "*" (-9999) if a register is disabled or unavailable)

NOTE: "*" means the parameter is not available. The value will be -9999.

PROGRAM command for a Set Point Step, Time-based(PTYP = TI)

Register # 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 Parameter 2 File Step Type SP Hour Min Sec * * *

PROGRAM command for a Set Point Step, Rate-based(PTYP = RATE)

Register # 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 Parameter 2 File Step Type SP * * * Rate JF *

PROGRAM command for a Soak Step

Register # 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 Parameter 2 File Step Type * Hour Min Sec * * *

PROGRAM command for a Jump Loop Step

Register # 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 Parameter 2 File Step Type *****JFJS

PROGRAM command for a Link File Step

Register # 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 Parameter 2 File Step Type *******

PROGRAM command for an End Step Step

Register # 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 Parameter 2 File Step Type *******

5.14

Data Communications with the Watlow Series 988 Family Command Summary Series 981-984, Chapter 5

Ramping Controller Commands

1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 ******ES3* ****

1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 **WEWP**ES3*****

981, 982,

983, 984

1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 *******ES3* ****

1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 ***WEWP**ES3* ****

1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 JC******** ****

1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 *LF******* ****

1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 **ES****** ****

Command Summary Series 981-984, Chapter 5

Data Communications with the Watlow Series 988 Family

5.15

Ramping Controller MTR Command

983, 984

981, 982,

Table 5.16 -

Modbus RTU Addresses

Table 5.16 - 982 Modbus RTU Addresses

Relative

Address Absolute Address Parameter

40001 0 MDL (982) 40002 1 SRNT 40003 2 SRNB 40005 4 SOFT 40006 5 DATE 40009 8 ITY1 40010 9 ITY2 40017 16 OTY1 40018 17 OTY2 40019 18 OTY3 40020 19 OTY4 40101 100 C1 40104 103 PWR 40105 104 C2 40107 106 ALM 40111 110 ALM 40201 200 RHS 40202 201 EI1S 40210 209 ER 40212 211 DEV 40214 213 EI2S 40301 300 SP1 40305 304 ATSP 40306 305 AUT 40309 308 IDSP 40322 321 A2LO 40323 322 A2HI 40341 340 A3LO 40342 341 A3HI 40501 500 PB1 40502 501 IT1 40503 502 RE1 40504 503 DE1 40505 504 RA1 40506 505 DB

Relative

Address Absolute Address Parameter

40507 506 CT1 40508 507 HYS1 40511 510 PB2 40512 511 IT2 40513 512 RE2 40514 513 DE2 40515 514 RA2 40517 516 CT2 40518 517 HYS2 40602 601 IN1 40603 602 RL1 40604 603 RH1 40605 604 FTR1 40606 605 CAL1 40607 606 DEC1 40608 607 ERR 40610 609 RTD1 40612 611 IN2 40613 612 RL2 40614 613 RH2 40616 615 CAL2 40701 700 OT1 40702 701 PRC1 40715 714 HIP 40716 715 LOP 40718 717 OT2 40719 718 PRC2 40720 719 AL2 40721 720 HYS2 40722 721 LAT2 40723 722 SIL2 40726 725 ANUN 40735 734 OT3 40737 736 AL3 40738 737 HYS3

Absolute Address Parameter

40739 738 LAT3 40740 739 SIL3 40736 735 PRC3 40744 743 AOUT 40745 744 ARL 40746 745 ARH 40747 746 ACAL 40901 900 DFL 40902 901 CF 41061 1060 EI1 41063 1062 EI2 41201 1200 MTR 41202 1201 STP 41203 1202 CSP 41204 1203 EJC 41205 1204 ENSP 41206 1205 GSD 41207 1206 POUT 41208 1207 PSTR 41209 1208 PTYP 41210 1209 RESU 41211 1210 HOLD 41212 1211 ABSP 41269 1268 ENT3 41301 1300 LOC 41501 1500 AMB 41515 1514 TOUT 41901 1900 MOD 41902 1901 DISP 41905 1904 SHYS 41906 1905 HUNT 41907 1906 LRNL 41908 1907 LRNH

Relative

Address

5.16

Data Communications with the Watlow Series 988 Family Command Summary Series 981-984, Chapter 5

Temperature/process Controller Prompt Table

Chapter 6 Command Summary of the Series 986-989

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2 Modbus address

Complete Parameter Download Sequence

When you download a complete set of parameters to a controller, you must load them in this order. The user's manual has more information about prompt interaction.

*IN1 *IN2

RTD1 RTD2 CNTL CSAC ALGO DFL

*CF

OT1 OT2 OT3 DEC1 RL1 RH1 CAL1 FTR1 LIN1 RSP DEC2 RL2 RH2 CAL2 FTR2 LIN2 HUNT SHYS PRC1 HYS1 PRC2 HYS2 SP2C AL2 A2SD LAT2 SIL2 AL3 A3SD

HYS3 LAT3 SIL3 AOUT PRC3 ARL ARH ACAL ERR PID2 PROC STPT EI1 EI2 ANUN LOP HIP FAIL ATSP RP RATE A2LO A2HI A3LO A3HI LR PB1A RE1A IT1A RA1A DE1A CT1A PB2A RE2A IT2A RA2A

DE2A CT2A DBA PB1B RE1B IT1B RA1B DE1B CT1B PB2B RE2B IT2B RA2B DE2B CT2B DBB SP2 IDSP SP1 LOC SYS PIDA PIDB INPT OTPT GLBL COM DIAG CAL OPLP SPEE

986, 987,

988, 989

ç

CAUTION: Entering commands out of sequence will produce unexpected results, because some prompts change the values of other prompts. Copy this page and use the checkboxes.

Table 6.1 Download Sequence.

* Wait at least two seconds after executing this command before going on to the next command.

Command Summary Series 986-989, Chapter 6

Data Communications with the Watlow Series 988 Family

6.1

Temperature/process Controller Prompt Table

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2 Modbus address

Table 6.2 -

A2HI to ALM

ç

CAUTION: Avoid writing <=> continuously, such as ramping set

988, 989

points or repetitive loops, to the Series 986-989 EEPROM memory. Continuous writes

986, 987,

may result in premature control failure, system downtime and damage to processes and equipment.

NOTE: The number of decimal places returned by many of these commands is determined by the DEC1, DEC2, IN1 or IN2 setting. (This does not apply to Modbus Protocol.)

A2HI Output 2 Alarm High ? <sp> A2HI <cr> Process: A2LO to sensor high range

14 = <sp> A2HI <sp> data.2 <cr> Deviation: 0 to 9999°

A2LO Output 2 Alarm Low ? <sp> A2LO <cr> Process: sensor low range to A2HI 13 = <sp> A2LO <sp> data.2 <cr> Deviation: -999 to 0°

A3HI Output 3 Alarm High ? <sp> A3HI<cr> Process: A3LO to sensor high range 16 = <sp> A3HI <sp> data.2 <cr> Deviation: 0 to 9999°

A3LO Output 3 Alarm Low ? <sp> A3LO <cr> Process: sensor low range to A3HI 15 = <sp> A3LO <sp> data.2 <cr> Deviation: -999 to 0°

ACAL Analog Offset ? <sp> ACAL <cr> -999 to 999°F 94 = <sp> ACAL <sp> data.2 <cr> -555 to 555°C

AL2 Alarm 2 Type ? <sp> AL2 <cr> 0 = Deviation Alarm, Input 2 74 = <sp> AL2 <sp> data.2 <cr> 1 = Process Alarm, Input 2

AL3 Alarm 3 Type ? <sp> AL3 <cr> 0 = Deviation Alarm, Input 2 79 = <sp> AL3 <sp> data.2 <cr> 1 = Process Alarm, Input 2

ALGO Algorithm ? <sp> ALGO <cr> 0 = two sets of PID prompts [Pid2] 100 = <sp> ALGO <sp> data.2 <cr> 1 = one set of PID prompts [Pid]

ALM Alarm Status ? <sp> ALM <cr> 0 = No alarms occurring (0000 0000) 3 (Writing a 0 clears = <sp> ALM <sp> 0 <cr> Bit 1 = A2LO (0000 0001)

next alarm.) Bit 2 = A2HI (0000 0010)

Rate: 0 to 9999°/minute Default: RH, 999°, or 999°/min.

Rate: -9999 to 0°/minute Default: RL, -999°, or -999°/min.

Rate: 0 to 9999°/minute Default: RH, 999°, or 999°/min.

Rate: -999 to 0°/minute Default: RL, -999°, or -999°/min.

-999 to 999 units Default: 0°F, 0°C, 0 units

2 = Process Alarm, Input 1 3 = Deviation Alarm, Input 1 4 = Rate Alarm, Input 1 Default: 2

2 = prop/derivative w/manual reset [Pdr] 3 = 1 process output both heat or cool [dUPL] Default: 1

Bit 3 = A3LO (0000 0100) Bit 4 = A3HI (0000 1000)

6.2

Data Communications with the Watlow Series 988 Family

Command Summary Series 986-989, Chapter 6

Temperature/process Controller Prompt Table

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2 Modbus address

AMB Ambient Terminal ? <sp> AMB <cr> Input 1 terminals in 0.0°F 125 Temperature

ANUN Alarm Annunciation ? <sp> ANUN <cr> 0 = off

106 = <sp> ANUN <sp> data.2 <cr> 1 = on

Default: on

AOUT Analog Output 3 ? <sp> AOUT <cr> 0 = Retransmit Process Output 1 90 Retransmit Function = <sp> AOUT <sp> data.2 <cr> 1 = Retransmit Set Point 1

2 = off

3 = Retransmit Process Output 2

Default: 0

ARH Retransmit ? <sp> ARH <cr> ARL to 9999 93 Range High = <sp> ARH <sp> data.2 <cr> Default: RH1 or RH2 per AOUT

ARL Retransmit ? <sp> ARL <cr> -999 to ARH 92 Range Low = <sp> ARL <sp> data.2 <cr> Default: RL1 or RL2 per AOUT

ATM Auto-Manual Key ? <sp> ATM <cr> 0 = Auto mode 10 (Any data.2 toggles = <sp> ATM <sp> data.2 <cr> 4 = Manual mode

ATM, like the pressing Default: n/a the AUTO/MAN key.) Disabled if LOC = 2 or 3

AUT Auto-tune ? <sp> AUT <cr> 0 = No auto-tuning 19 = <sp> AUT <sp> data.2 <cr> 1 = Tune PID Set A

2 = Tune PID Set B

Default: off

ATSP Auto-tune ? <sp> ATSP <cr> 50 to 150% 109 Set Point % = <sp> ATSP <sp> data.2 <cr> Default: 90%

C1 Input 1 Value ? <sp> C1 <cr> Based on IN1 range ; RL1 to RH1 1

C2 Input 2 Value ? <sp> C2 <cr> Based on IN2 range ; RL2 to RH2 2

CAL Lockout ? <sp> CAL <cr> 0 = No lockout 121 Calibration Menu = <sp> CAL <sp> data.2 <cr> 1 = Read only

2 = No read or write

Default: 0

CAL1 Input 1 Calibration ? <sp> CAL1 <cr> -999 to 9999 51 Offset = <sp> CAL1 <sp> data.2 <cr> Default: 0

CAL2 Input 2 Calibration ? <sp> CAL2 <cr> -999 to 9999 59 Offset = <sp> CAL2 <sp> data.2 <cr> Default: 0

CF Degrees Select ? <sp> CF <cr> 0 = Display °F 95 Display Loop = <sp> CF <sp> data.2 <cr> 1 = Display °C

Default = 0

CNTL Control Function ? <sp> CNTL <cr> 0 = Normal 98 = <sp> CNTL <sp> data.2 <cr> 1 = Cascade

2 = Ratio

3 = Differential

Default = 0

COM Lockout Comms ? <sp> COM <cr> 0 = No lockout 119 Menu = <sp> COM <sp> data.2 <cr> 1 = Read only

2 = No read or write

Default: 0

CSAC Cascade Action ? <sp> CSAC <cr> 0 = direct action 99 = <sp> CSAC <sp> data.2 <cr> 1 = reverse action

Table 6.3 -

AMB to CSAC

ç

CAUTION: Avoid writing <=> continuously, such as ramping set points or repetitive loops, to the Series 986-989 EEPROM memory. Continuous writes may result in premature control failure, system downtime and damage to processes and equipment.

NOTE: The number of decimal places returned by many of these commands is determined by the DEC1, DEC2, IN1 or IN2 setting. (This does not apply to Modbus Protocol.)

986, 987,

988, 989

Command Summary Series 986-989, Chapter 6

Data Communications with the Watlow Series 988 Family

6.3

Temperature/process Controller Prompt Table

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2 Modbus address

Table 6.4 -

CT1A to DIAG

ç

CAUTION:

988, 989

Avoid writing <=> continuously, such as ramping set points or repetitive loops, to the Series 986-989

986, 987,

EEPROM memory. Continuous writes may result in premature control failure, system downtime and damage to processes and equipment.

NOTE: The number of decimal places returned by many of these commands is determined by the DEC1, DEC2, IN1 or IN2 setting. (This does not apply to Modbus Protocol.)

CT1A Cycle Time ? <sp> CT1A <cr> S.S. relay or open col: 26 Output 1 PID Set A = <sp> CT1A <sp> data.2 <cr> 0.0 = Burst firing, or

CT1B Cycle Time ? <sp> CT1B <cr> S.S. relay or open col: 39 Output 1 PID Set B = <sp> CT1B <sp> data.2 <cr> 0.0 = Burst firing (brSt), or

CT2A Cycle Time ? <sp> CT2A <cr> S.S. relay or open col: 32 Output 2 PID Set A = <sp> CT2A <sp> data.2 <cr> 0.0 = Burst firing (brSt), or

CT2B Cycle Time ? <sp> CT2B <cr> S.S. relay or open col: 45 Output 2 PID Set B = <sp> CT2B <sp> data.2 <cr> 0.0 = Burst firing (brSt), or

DATE Factory ? <sp> DATE <cr> xxyy 122 Test Date xx = week

DBA Deadband ? <sp> DBA <cr> -999°F to 999°F 33 PID Set A = <sp> DBA <sp> data.2 <cr> -555°C to 555°C

DBB Deadband ? <sp> DBB <cr> -999°F to 999°F 46 PID Set B = <sp> DBB <sp> data.2 <cr> -555°C to 555°C

DE1A Derivative ? <sp> DE1A <cr> 0.00 to 9.99 minutes 25 Output 1 PID Set A = <sp> DE1A <sp> data.2 <cr> Default: 0.00

DE2A Derivative ? <sp> DE2A <cr> 0.00 to 9.99 minutes 31 Output 2 PID Set A = <sp> DE2A <sp> data.2 <cr> Default: 0.00

DE1B Derivative ? <sp> DE1B <cr> 0.00 to 9.99 minutes 38 Output 1 PID Set B = <sp> DE1B <sp> data.2 <cr> Default: 0.00

DE2B Derivative ? <sp> DE2B <cr> 0.00 to 9.99 minutes 44 Output 2 PID Set B = <sp> DE2B <sp> data.2 <cr> Default: 0.00

DEC1 Decimal Point ? <sp> DEC1 <cr> 0 = Decimal point 0 48 Process Input 1 = <sp> DEC1 <sp> data.2 <cr> 1 = Decimal point 0.0

DEC2 Decimal Point ? <sp> DEC2 <cr> 0 = Decimal point 0 56 Process Input 2 = <sp> DEC2 <sp> data.2 <cr> 1 = Decimal point 0.0

DEV Process Deviation ? <sp> DEV <cr> Difference between SP1 and C1

5 Display Loop (IN 1) DFL Default Unit Type ? <sp> DFL <cr> 0 = US units

140 = <sp> DFL <sp> data.2 <cr> 1 = Standard International units DIAG Lockout ? <sp> DIAG <cr> 0 = No lockout

120 Diagnostics Menu = <sp> DIAG <sp> data.2 <cr> 1 = Read only

0.1 to 999.9 sec. (time prop) Mech relay: 5.0 to 999.9 sec. Default: 1.0 or 10.0 sec.

yy = year

-999 units to 999 units Default: 0°F, 0°C, or 0 units

2 = Decimal point 0.00 3 = Decimal point 0.000 Default: 0

2 = No read or write Default: 0

6.4

Data Communications with the Watlow Series 988 Family

Command Summary Series 986-989, Chapter 6

Temperature/process Controller Prompt Table

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2 Modbus address

EI1 Event Input 1 ? <sp> EI1 <cr> Software Revision

11 Function = <sp> EI1 <sp> data.2 <cr> thru M N and later

0 0 = Switch PID Sets 1 1 = None 2 2 = Lock out keyboard 3 3 = Alarm reset N/A 4 = Auto/manual select 4 5 = Turn control outputs off 5 6 = Reverse Output 1 6 7 = Activate Idle Set Point 7 8 = Activate Remote Set Pt Default: 1

EI1S Event Input 1 Status ? <sp> EI1S <cr> 0 = off (open) 104 1 = on (closed)

EI2 Event Input 2 ? <sp> EI2 <cr> Software Revision 12 Function = <sp> EI2 <sp> data.2 <cr> thru M N and later

0 0 = Switch PID Sets 1 1 = None 2 2 = Lock out keyboard 3 3 = Alarm reset N/A 4 = Auto/manual select 4 5 = Turn control outputs off 5 6 = Reverse Output 1 6 7 = Activate Idle Set Point 7 8 = Activate Remote Set Pt Default: 1

EI2S Event Input 2 Status ? <sp> EI2S <cr> 0 = off (open) 105 1 = on (closed)

ER Error, Analog Input ? <sp> ER <cr> 0 = No error 4 (Multiple errors 1 = Input 1 A-D overflow

possible.) 2 = Input 1 overrange

3 = Input 1 underrange 4 = Input 1 A-D underflow 5 = Input 2 A-D overflow 6 = Input 2 overrange 7 = Input 2 underrange 8 = Input 2 A-D underflow 9 = Ambient error 10 = Heater 11 = Open loop

ER2 Error, ? <sp> ER2 <cr> 0 = No error n/a Communications 1 = Transmit buffer overflow

2 = Receive buffer overflow 3 = Framing error 4 = Overrun error 5 = Parity error 6 = Talking out of turn 7 = Invalid reply error 8 = Noise error 20 = Command not found 21 = Prompt not found 22 = Incomplete command line 23 = Invalid character 24 = Number of chars. overflow 25 = Input out of limit 26 = Read only command 27 = Write allowed only 28 = Prompt not active

ERR Error, ? <sp> ERR <cr> 0 = Errors latching 97 Latching Enable = <sp> ERR <sp> data.2 <cr> 1 = Errors non-latching

Default = 1

FAIL Sensor Failure ? <sp> FAIL <cr> Bumpless = LOP - 1% 96 Output Function = <sp> FAIL <sp> data.2 <cr> Heat/cool manual = -100 to 100%

Heat only manual = 0% to 100% Cool only manual = -100% to 0% Default = Bumpless

Table 6.5 -

EI1 to FAIL

ç

CAUTION: Avoid writing <=> continuously, such as ramping set points or repetitive loops, to the Series 986-989 EEPROM memory. Continuous writes may result in premature control failure, system downtime and damage to processes and equipment.

NOTE: The number of decimal places returned by many of these commands is determined by the DEC1, DEC2, IN1 or IN2 setting. (This does not apply to Modbus Protocol.)

986, 987,

988, 989

Command Summary Series 986-989, Chapter 6

Data Communications with the Watlow Series 988 Family

6.5

Temperature/process Controller Prompt Table

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2 Modbus address

Table 6.6 -

FTR1 to IN1

ç

CAUTION: Avoid writing <=> continuously, such as ramping set

988, 989

points or repetitive loops, to the Series 986-989 EEPROM memory. Continuous writes

986, 987,

may result in premature control failure, system downtime and damage to processes and equipment.

NOTE: The number of decimal places returned by many of these commands is determined by the DEC1, DEC2, IN1 or IN2 setting.

NOTE: (RTD setting) For JIS curve, go to rtd1 prompt after selecting In1.

FTR1 Process Input 1 ? <sp> FTR1 <cr> -60 to 60 seconds 53 Filter Time Constant = <sp> FTR1 <sp> data.2 <cr> Default: 0

FTR2 Process Input 2 ? <sp> FTR2 <cr> -60 to 60 seconds 63 Filter Time Constant = <sp> FTR2 <sp> data.2 <cr> Default: 0

GLBL Lockout ? <sp> GLBL <cr> 0 = No lockout 118 Global Menu = <sp> GLBL <sp> data.2 <cr> 1 = Read only

HIP High Power Limit ? <sp> HIP <cr> LOP (%) to 100%

108 = <sp> HIP <sp> data.2 <cr> Default: 100 (Heat / cool)

HUNT Slidewire ? <sp> HUNT <cr> 0.1% to 100.0% 65 Deadband % = <sp> HUNT <sp> data.2 <cr> Default: 1.0%

HYS1 Output 1 Hysteresis ? <sp> HYS1 <cr> 0°F to 999°F 69 = <sp> HYS1 <sp> data.2 <cr> 0°C to 555°C

HYS2 Output 2 Hysteresis ? <sp> HYS2 <cr> 0°F to 999°F 72 = <sp> HYS2 <sp> data.2 <cr> 0°C to 555°C

HYS3 Output 3 Hysteresis ? <sp> HYS3 <cr> 0°F to 999°F 81 = <sp> HYS3 <sp> data.2 <cr> 0°C to 555°C

IDSP Idle Set Point ? <sp> IDSP <cr> RL1 to RH1 9 = <sp> IDSP <sp> data.2 <cr>

IN1 Input 1 Type ? <sp> IN1 <cr> 1 = J t/c; 32 to 1500°F/0 to 816°C 47 = <sp> IN1 <sp> data.2 <cr> 2 = K t/c; -328 to 2500°F/-200 to 1371°C

(Caution: Writing to 3 = T t/c; -328 to 750°F/-200 to 399°C IN1 resets most 4 = N t/c; 32 to 2372°F/0 to 1300°C prompts to their de- 5 = E t/c; -328 to 1470°F/-200 to 799°C fault state.) 6 = C t/c (W3); 32 to 4200°F 0 to 2316°C

2 = No read or write Default: 0

Default: 0 (Cool only)

0 units to 999 units Default: 3°F, 2°C, or 3 units

7 = D t/c (W5); 32 to 4200°F/0 to 2316°C 8 = Pt 2; 32 to 2543°F/0 to 1395°C 10 = R t/c; 32 to 3200°F/0 to 1760°C 11 = S t/c; 32 to 3200°F/0 to 1760°C 12 = B t/c; 1598 to 3300°F/870 to 1816°C 14 = 1° RTD (DIN); -328 to 1472°F/

-200 to 800°C

15 = 0.1° RTD (DIN); -99.9 to 999.9°F/

-99.9 to 700.0°C 17 = 4-20mA; -999 to 9999 units 18 = 0-20mA; -999 to 9999 units 19 = 0-5VÎ (dc); -999 to 9999 units 20 = 1-5VÎ (dc); -999 to 9999 units 21 = 0-10VÎ (dc); -999 to 9999 units 23 = 0-50mVÎ (dc); -999 to 9999 units 24 = 0-100mVÎ (dc); -999 to 9999 units 34 = 0-50mVÎ (dc); -999 to 9999 units

6.6

Data Communications with the Watlow Series 988 Family

Command Summary Series 986-989, Chapter 6

Temperature/process Controller Prompt Table

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2 Modbus address

IN2 Input 2 Type ? <sp> IN2 <cr> 0 = t/c Low Gain off

55 = <sp> IN2 <sp> data.2 <cr> 1 = J t/c; 32 to 1500°F/0 to 816°C

2 = K t/c; -328 to 2500°F/-200 to 1371°C (Caution: Writing to 3 = T t/c; -328 to 750°F/-200 to 399°C IN2 resets most 4 = N t/c; 32 to 2372°F/0 to 1300°C prompts to their de- 5 = E t/c; -328 to 1470°F/-200 to 799°C fault state.) 6 = C t/c (W3); 32 to 4200°F 0 to 2316°C

7 = D t/c (W5); 32 to 4200°F/0 to 2316°C

8 = Pt 2; 32 to 2543°F/0 to 1395°C

9 = t/c High Gain off

10 = R t/c; 32 to 3200°F/0 to 1760°C

11 = S t/c; 32 to 3200°F/0 to 1760°C

12 = B t/c; 1598 to 3300°F/870 to 1816°C

13 = RTD off

14 = 1° RTD (DIN); -328 to 1472°F/

-200 to 800°C

15 = 0.1° RTD (DIN); -99.9 to 999.9°F/

-99.9 to 700.0°C 16 = Process off 17 = 4-20mA; -999 to 9999 units 18 = 0-20mA; -999 to 9999 units 19 = 0-5VÎ (dc); -999 to 9999 units 20 = 1-5VÎ (dc); -999 to 9999 units 21 = 0-10VÎ (dc); -999 to 9999 units 22 = Millivolts off 23 = 0-50mVÎ (dc); -999 to 9999 units 24 = 0-100mVÎ (dc); -999 to 9999 units 26 = Resistance off 27 = Slidewire; 100 to 1200Ω 28 = Potentiometer; 0 to 1200Ω 29 = Heater current off 30 = Heater Current; 0 to 50A 31 = Open loop detect 32 = Event input 2 off 33 = Event input 2 on

INPT Lockout Input Menu ? <sp> INPT <cr> 0 = No input menu lockout 116 = <sp> INPT <sp> data.2 <cr> 1 = Read only

2 = No read or write allowed Default: 0

IT1A Integral for Output 1 ? <sp> IT1A <cr> 0.00 to 99.99 minutes per repeat 24 PID Set A = <sp> IT1A <sp> data.2 <cr> Default: 0.00 minutes per repeat

IT2A Integral for Output 2 ? <sp> IT2A <cr> 0.00 to 99.99 minutes per repeat 30 PID Set A = <sp> IT2A <sp> data.2 <cr> Default: 0.00 minutes per repeat

IT1B Integral for Output 1 ? <sp> IT1B <cr> 0.00 to 99.99 minutes per repeat 37 PID Set B = <sp> IT1B <sp> data.2 <cr> Default: 0.00 minutes per repeat

IT2B Integral for Output 2 ? <sp> IT2B <cr> 0.00 to 99.99 minutes per repeat 43 PID Set B = <sp> IT2B <sp> data.2 <cr> Default: 0.00 minutes per repeat

INSP Cascade ? <sp> INSP <cr> RL1 to RH1, or 144 Inner SP if CNTL = 2 (ratio), then 0.0 to 20.0

if CNTL = 3 (differential), then -999 to 999 if ATM = 1, then 0 to 100% Default: per IN1 and hardware

ITY1 Input 1 ? <sp> ITY1 <cr> 0 = None 130 Hardware Type 1 = t/c only

2 = Current 3 = Slide wire 4 = Input off 5 = Universal RTD 6 = Universal high gain t/c 7 = Universal low gain t/c 8 = Universal millivolts 9 = Universal process

Table 6.7 -

IN2 to ITY1

ç

CAUTION: Avoid writing <=> continuously, such as ramping set points or repetitive loops, to the Series 986-989 EEPROM memory. Continuous writes may result in premature control failure, system downtime and damage to processes and equipment.

NOTE: (RTD setting) For JIS curve, go to rtd1 prompt after selecting In1.

NOTE: The number of decimal places returned by many of these commands is determined by the DEC1, DEC2, IN1 or IN2 setting.

986, 987,

988, 989

Command Summary Series 986-989, Chapter 6

Data Communications with the Watlow Series 988 Family

6.7

Temperature/process Controller Prompt Table

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2 Modbus address

Table 6.8 -

ITY2 Input 2 ? <sp> ITY2 <cr> 0 = None 131 Hardware Type 1 = t/c only

ITY2 to OT2

ç

CAUTION: Avoid writing <=> continuously, such as ramping set

988, 989

points or repetitive loops, to the Series 986-989 EEPROM memory. Continuous writes

986, 987,

may result in premature control failure, system downtime and damage to processes and equipment.

NOTE: The number of decimal places returned by many of these commands is determined by the DEC1, DEC2, IN1 or IN2 setting. (This does not apply to Modbus Protocol.)

LAT2 Alarm 2 Latching ? <sp> LAT2 <cr> 0 = Latching alarms

76 = <sp> LAT2 <sp> data.2 <cr> 1 = Non-latching alarms

LAT3 Alarm 3 Latching ? <sp> LAT3 <cr> 0 = Latching alarms 82 = <sp> LAT3 <sp> data.2 <cr> 1 = Non-latching alarms

LIN1 Linearization ? <sp> LIN1 <cr> 0 = None 54 Process Input 1 = <sp> LIN1 <sp> data.2 <cr> 1 = Square root extraction

LIN2 Linearization ? <sp> LIN2 <cr> 0 = None 64 Process Input 2 = <sp> LIN2 <sp> data.2 <cr> 1 = Square root extraction

LOC Keyboard Lockout ? <sp> LOC <cr> 0 = No lockout 112 = <sp> LOC <sp> data.2 <cr> 1 = Lock out mode key

LOP Low Power Limit ? <sp> LOP <cr> -100% to HIP (%) 107 = <sp> LOP <sp> data.2 <cr> Default: -100% (Heat / cool)

LRNH Learn High Slide- ? <sp> LRNH <cr> 0 = No function 62 wire Resistance = <sp> LRNH <sp> data.2 <cr> 1 = Learn

LRNL Learn Low Slide- ? <sp> LRNL <cr> 0 = No function 61 wire Resistance = <sp> LRNL <sp> data.2 <cr> 1 = Learn

LR Local-Remote ? <sp> LR <cr> 0 = Local set point 20 Set Point Select = <sp> LR <sp> data.2 <cr> 1 = Remote set point

MDL Model Number ? <sp> MDL <cr> 988 (986-989 units) 0

OT1 Output 1 Action ? <sp> OT1 <cr> 0 = Heat 67 = <sp> OT1 <sp> data.2 <cr> 1 = Cool

OT2 Output 2 Action ? <sp> OT2 <cr> 0 = Heat 70 = <sp> OT2 <sp> data.2 <cr> 1 = Cool

2 = Current 3 = Slide wire 4 = Input off 5 = Universal RTD 6 = Universal high gain t/c 7 = Universal low gain t/c 8 = Universal millivolts 9 = Universal process 10 = Event input

Default: 1

Default: 0

2 = Lock out mode and auto/manual keys 3 = Lock out all single keys Default: 0

Default: 0% (Heat only)

Default: 0

2 = None 3 = Alarm 2 4 = Alarm 2 reverse acting

6.8

Data Communications with the Watlow Series 988 Family

Command Summary Series 986-989, Chapter 6

Temperature/process Controller Prompt Table

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2 Modbus address

OT3 Output 3 Action ? <sp> OT3 <cr> 0 = None

78 = <sp> OT3 <sp> data.2 <cr> 1 = Alarm 3

2 = Alarm 3 reverse acting

OTPT Lockout Output ? <sp> OTPT <cr> 0 = No lockout 117 Menu = <sp> OTPT <sp> data.2 <cr> 1 = Read only

2 = No read or write Default: 0

OTY1 Output 1 Hardware ? <sp> OTY1 <cr> 0 = None 132 1 = SSR 0.5A OTY2 Output 2 Hardware ? <sp> OTY2 <cr> 2 = SSR 0.5A with suppression 133 6 = Switched dc OTY3 Output 3 Hardware ? <sp> OTY3 <cr> 8 = Relay 5A Form C 134 9 = Relay 5A Form C with suppr. OTY4 Output 4 Hardware ? <sp> OTY4 <cr> 10 = Relay 5A Form A/B 135 11 = Relay 5A Form A/B with suppr.

13 = Process output 14 = Voltage retransmit 15 = Current retransmit 16 = Power supply 17 = Comms EIA-232 18 = Comms EIA -485 / EIA-422 19 = Comms EIA-485 / EIA-232

PB1A Proportional Band ? <sp> PB1A <cr> if DFL = 0, then 0 to 9999 21 Output 1 PID Set A = <sp> PB1A <sp> data.2 <cr> if DFL = 1, then 0.0 to 99.9% of span

Default: 25°F, 14°C, 25 units or 3.0%

PB1B Proportional Band ? <sp> PB1B <cr> if DFL = 0, then 0 to 9999 34 Output 1 PID Set B = <sp> PB1B <sp> data.2 <cr> if DFL = 1, then 0.0 to 99.9% of span

Default: 25°F, 14°C, 25 units or 3.0%

PB2A Proportional Band ? <sp> PB2A <cr> if DFL = 0, then 0 to 9999 27 Output 2 PID Set A = <sp> PB2A <sp> data.2 <cr> if DFL = 1, then 0.0 to 99.9% of span

Default: 25°F, 14°C, 25 units or 3.0%

PB2B Proportional Band ? <sp> PB2B <cr> if DFL = 0, then 0 to 9999 40 Output 2 PID Set B = <sp> PB2B <sp> data.2 <cr> if DFL = 1, then 0.0 to 99.9% of span

Default: 25°F, 14°C, 25 units or 3.0%

PIDA Lockout PID Set A ? <sp> PIDA <cr> 0 = No lockout 114 Menu = <sp> PIDA <sp> data.2 <cr> 1 = Read only

2 = No read or write Default: 0

PIDB Lockout PID Set B ? <sp> PIDB <cr> 0 = No lockout 115 Menu = <sp> PIDB <sp> data.2 <cr> 1 = Read only

2 = No read or write Default: 0

Table 6.9 -

OT3 to PIDB

ç

CAUTION: Avoid writing <=> continuously, such as ramping set points or repetitive loops, to the Series 986-989 EEPROM memory. Continuous writes may result in premature control failure, system downtime and damage to processes and equipment.

NOTE: The number of decimal places returned by many of these commands is determined by the DEC1, DEC2, IN1 or IN2 setting. (This does not apply to Modbus Protocol.)

986, 987,

988, 989

Command Summary Series 986-989, Chapter 6

Data Communications with the Watlow Series 988 Family

6.9

Temperature/process Controller Prompt Table

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2 Modbus address

Table 6.10 -

PID2 PID Set Crossover ? <sp> PID2 <cr> 0 = Process 101 Source Selection = <sp> PID2 <sp> data.2 <cr> 1 = Set point

PID2 to RH2

PRC1 Process Range ? <sp> PRC1 <cr> 0 = 4-20mA 68 Output 1 = <sp> PRC1 <sp> data.2 <cr> 1 = 0-20mA

ç

CAUTION: Avoid writing <=> continuously, such as ramping set

988, 989

points or repetitive loops, to the Series 986-989 EEPROM memory. Continuous writes

986, 987,

may result in premature control failure, system downtime and damage to processes and equipment.

NOTE: The number of decimal places returned by many of these commands is determined by the DEC1, DEC2, IN1 or IN2 setting. (This does not apply to Modbus Protocol.)

PRC2 Process Range ? <sp> PRC2 <cr> 0 = 4-20mA 71 Output 2 = <sp> PRC2 <sp> data.2 <cr> 1 = 0-20mA

PRC3 Process Range ? <sp> PRC3 <cr> 0 = 4-20mA 91 Output 3 = <sp> PRC3 <sp> data.2 <cr> 1 = 0-20mA

PROC Process Value for ? <sp> PROC <cr> RL1 to RH1 102 PID A <-> B Switch = <sp> PROC <sp> data.2 <cr> Default: per IN1 and hardware

PWR Percent Power ? <sp> PWR <cr> -100% to 100% 6 Present Output n/a

RA1A Rate Output 1 ? <sp> RA1A <cr> 0.00 to 9.99 minutes 23 PID Set A = <sp> RA1A <sp> data.2 <cr> Default: 0.00

RA1B Rate Output 1 ? <sp> RA1B <cr> 0.00 to 9.99 minutes 36 PID Set B = <sp> RA1B <sp> data.2 <cr> Default: 0.00

RA2A Rate Output 2 ? <sp> RA2A <cr> 0.00 to 9.99 minutes 29 PID Set A = <sp> RA2A <sp> data.2 <cr> Default: 0.00

RA2B Rate Output 2 ? <sp> RA2B <cr> 0.00 to 9.99 minutes 42 PID Set B = <sp> RA2B <sp> data.2 <cr> Default: 0.00

RE1A Reset Output 1 ? <sp> RE1A <cr> if ALGO = 0, 1, or 3, then 22 PID Set A = <sp> RE1A <sp> data.2 <cr> 0.00 to 9.99 repeats/min.

RE1B Reset Output 1 ? <sp> RE1B <cr> if ALGO = 0, 1, or 3, then 35 PID Set B = <sp> RE1B <sp> data.2 <cr> 0.00 to 9.99 repeats/min.

RE2A Reset Output 2 ? <sp> RE2A <cr> if ALGO = 0, 1, or 3, then 28 PID Set A = <sp> RE2A <sp> data.2 <cr> 0.00 to 9.99 repeats/min.

RE2B Reset Output 2 ? <sp> RE2B <cr> if ALGO = 0, 1, or 3, then 41 PID Set B = <sp> RE2B <sp> data.2 <cr> 0.00 to 9.99 repeats/min.

RH1 Range High ? <sp> RH1 <cr> min. IN1 range to to max. IN1 range 50 Input 1 = <sp> RH1 <sp> data.2 <cr> Default: Sensor high range

RH2 Range High ? <sp> RH2 <cr> min. IN2 range to to max. IN2 range

58 Input 2 = <sp> RH2 <sp> data.2 <cr> Default: Sensor high range

2 = None Default: 0

2 = 0-5VÎ (dc) 3 = 1-5VÎ (dc) 4 = 0-10VÎ (dc) Default: 0

if ALGO = 2, then -100.0% to 100.0% Default: 0.00 repeats/min. or 0.0%

6.10

Data Communications with the Watlow Series 988 Family

Command Summary Series 986-989, Chapter 6

Temperature/process Controller Prompt Table

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2 Modbus address

RL1 Range Low ? <sp> RL1 <cr> min. IN1 range to to max. IN1 range 49 Input 1 = <sp> RL1 <sp> data.2 <cr> Default: Sensor low range

RL2 Range Low ? <sp> RL2 <cr> min. IN2 range to to max. IN2 range 57 Input 2 = <sp> RL2 <sp> data.2 <cr> Default: Sensor low range

RP Ramping Initiation ? <sp> RP <cr> 0 = off

110 = <sp> RP <sp> data.2 <cr> 1 = on startup

2 = on startup and set point change Default: 0

RSP Remote Set Point ? <sp> RSP <cr> 0 = off 142 = <sp> RSP <sp> data.2 <cr> 1 = on

Default: 0

RATE Ramp Rate ? <sp> RATE <cr> 0 to 9999°/minute 111 = <sp> RATE <sp> data.2 <cr> Default: 100°/minute

RTD1 RTD Calibration ? <sp> RTD1 <cr> 0 = JIS 52 Curve Input 1 = <sp> RTD1 <sp> data.2 <cr> 1 = DIN

Default: 1

RTD2 RTD Calibration ? <sp> RTD2 <cr> 0 = JIS 60 Curve Input 2 = <sp> RTD2 <sp> data.2 <cr> 1 = DIN

Default: 1

SHYS Slidewire ? <sp> SHYS <cr> 0 to HUNT 66 Hysteresis = <sp> SHYS <sp> data.2 <cr>

SIL2 Alarm 2 Silence ? <sp> SIL2 <cr> 0 = off/disabled 77 = <sp> SIL2 <sp> data.2 <cr> 1 = on/enabled

Default: 0

SIL3 Alarm 3 Silence ? <sp> SIL3 <cr> 0 = off/disabled 83 = <sp> SIL3 <sp> data.2 <cr> 1 = on/enabled

Default: 0

SRNB Serial Number ? <sp> SRNB <cr> xxxx = 0000 to 9999 124 Bottom Display

Read the six-digit unit serial number in two segments, "SNxx" and "xxxx," i.e., as in the upper and lower front panel displays.

SRNT Serial Number ? <sp> SRNT <cr> SNxx = 00 to 99 123 Top Display

SOFT Software Revision ? <sp> SOFT <cr> 0 = Rev A 7 = Rev H 14 = Rev O 141 1 = Rev B 8 = Rev I 15 = Rev P

2 = Rev C 9 = Rev J 16 = Rev Q 3 = Rev D 10 = Rev K 17 = Rev R 4 = Rev E 11 = Rev L 18 = Rev S 5 = Rev F 12 = Rev M 19 = Rev T 6 = Rev G 13 = Rev N 20 = Rev U

etc.

SP1 Set Point 1 ? <sp> SP1 <cr> RL1 to RH1, or 7 = <sp> SP1 <sp> data.2 <cr> if CNTL = 2 (ratio), then 0.0 to 20.0

if CNTL = 3 (differential), then -999 to 999 if ATM = 1, then 0 to 100% Default: per IN1 and hardware

Table 6.11 -

RL1 to SP1

ç

CAUTION: Avoid writing <=> continuously, such as ramping set points or repetitive loops, to the Series 986-989 EEPROM memory. Continuous writes may result in premature control failure, system downtime and damage to processes and equipment.

NOTE: The number of decimal places returned by many of these commands is determined by the DEC1, DEC2, IN1 or IN2 setting. (This does not apply to Modbus Protocol.)

986, 987,

988, 989

Command Summary Series 986-989, Chapter 6

Data Communications with the Watlow Series 988 Family

6.11

Temperature/process Controller Prompt Table

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2 Modbus address

Table 6.12 -

SP2 to TOUT

NOTE 1: Turning the controller off and on again resets SPEE to 0 and restores the last stored set point.

SP2 Set Point 2 ? <sp> SP2 <cr> RL1 to RH1 8 Heat/Heat or = <sp> SP2 <sp> data.2 <cr> Default: per input range (?)

Cool/Cool Only

SP2C Set Point 2 Type ? <sp> SP2C <cr> 0 = Process

73 = <sp> SP2C <sp> data.2 <cr> 1 = Deviation

SPEE Write Set Point ? <sp> SPEE <cr> 0 = Saves set point in EEPROM 143 to EEPROM = <sp> SPEE <sp> data.2 <cr> 1 = Does not save set point in EEPROM

STPT Set Point Value ? <sp> STPT <cr> RL1 to RH1 103 PID A <-> B Switch = <sp> STPT <sp> data.2 <cr> Default: Sensor type low range

SYS Lockout System ? <sp> SYS <cr> 0 = No lockout 113 Menu = <sp> SYS <sp> data.2 <cr> 1 = Read only

988, 989

TOUT Test Outputs = <sp> TOUT <sp> data.2 <cr> 1 = Output 1 on

137 2 = Output 2 on

ç

986, 987,

CAUTION: Avoid writing <=> continuously, such as ramping set points or repetitive loops, to the Series 986-989 EEPROM memory. Continuous writes may result in premature control failure, system downtime and damage to processes and equipment.

Default: 0

Default: 0 (See Note 1)

2 = No read or write Default: 0

3 = Output 3 on 4 = Output 4 on

NOTE 2: The number of decimal places returned by many of these commands is determined by the DEC1, DEC2, IN1 or IN2 setting. (This does not apply to Modbus Protocol.)

6.12

Data Communications with the Watlow Series 988 Family

Command Summary Series 986-989, Chapter 6

Temperature/process Controller Prompt Table

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2 Modbus address

Table 6.13 - 988 Modbus RTU Addresses

Relative

Address Absolute Address Parameter

40001 0 MODEL (988) 40002 1 C1 (input 1 value) 40003 2 C2 (input 2 value) 40004 3 ALM (alarm status) 40005 4 ER (system error) 40006 5 PROCESS DEVIATION 40007 6 OUTPUT POWER 40008 7 SP1 40009 8 SP2 40010 9 IDSP 40011 10 ATM (A/M mode) 40012 11 EI1 40013 12 EI2 40014 13 A2LO 40015 14 A2HI 40016 15 A3LO 40017 16 A3HI 40020 19 AUT 40021 20 L R 40022 21 PB1A 40023 22 RE1A 40024 23 RA1A 40025 24 IT1A 40026 25 DE1A 40027 26 CT1A 40028 27 PB2A 40029 28 RE2A 40030 29 RA2A 40031 30 IT2A 40032 31 DE2A 40033 32 CT2A 40034 33 DBA 40035 34 PB1B 40036 35 RE1B 40037 36 RA1B 40038 37 IT1B 40039 38 DE1B 40040 39 CT1B 40041 40 PB2B 40042 41 RE2B 40043 42 RA2B 40044 43 IT2B 40045 44 DE2B 40046 45 CT2B 40047 46 DBB

Relative

Address Absolute Address Parameter

40048 47 IN1 40049 48 DEC1 40050 49 RL1 40051 50 RH1 40052 51 CAL1 40053 52 RTD1 40054 53 FTR1 40055 54 LIN1 40056 55 IN2 40057 56 DEC2 40058 57 RL2 40059 58 RH2 40060 59 CAL2 40061 60 RTD2 40062 61 LRNL 40063 62 LRNH 40064 63 FTR2 40065 64 LIN2 40066 65 HUNT 40067 66 SHYS 40068 67 OT1 40069 68 PRC1 40070 69 HYS1 40071 70 OT2 40072 71 PRC2 40073 72 HYS2 40074 73 SP2C 40075 74 AL2 40076 75 A2SD 40077 76 LAT2 40078 77 SIL2 40079 78 OT3 40080 79 AL3 40081 80 A3SD 40082 81 HYS3 40083 82 LAT3 40084 83 SIL3 40091 90 AOUT 40092 91 PRC3 40093 92 ARL 40094 93 ARH 40095 94 ACAL 40096 95 C F 40097 96 FAIL 40098 97 ERR

Relative

Address Absolute Address Parameter

40099 98 CNTL 40100 99 CSAC 40101 100 ALGO 40102 101 PID2 40103 102 PROC 40104 103 STPT 40105 104 EI1 STATUS 40106 105 EI2 STATUS 40107 106 ANUN 40108 107 LOP 40109 108 HIP 40110 109 ATSP 40111 110 RP 40112 111 RATE 40113 112 LOC 40114 113 LOCK SYS 40115 114 LOCK PIDA 40116 115 LOCK PIDB 40117 116 LOCK INPT 40118 117 LOCK OTPT 40119 118 LOCK GLBL 40120 119 LOCK COM 40121 120 LOCK DIAG 40122 121 LOCK CAL 40123 122 DATE 40124 123 SN TOP 40125 124 SN BOTTOM 40126 125 AMB TEMP , °F 40127 126 AMB COUNTS 40128 127 GND COUNTS 40129 128 CH 1 COUNTS 40130 129 CH 2 COUNTS 40131 130 ITY1 40132 131 ITY2 40133 132 OTY1 40134 133 OTY2 40135 134 OTY3 40136 135 OTY4 40137 136 DISP 40138 137 TOUT 40139 138 OPLP 40140 139 RST 40141 140 DFL 40142 141 SOFT 40143 142 RSP 40144 143 SPEE 40145 144 INSP

986, 987,

988, 989

Command Summary Series 986-989, Chapter 6

Data Communications with the Watlow Series 988 Family

6.13

Temperature/process Controller Prompt Table

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2 Modbus address

Notes

988, 989

986, 987,

6.14

Data Communications with the Watlow Series 988 Family

Command Summary Series 986-989, Chapter 6

Dual Channel Controller Prompt Table

Name Description Read (?) and/or Write (=) Syntax Range

Chapter 7 Command Summary of the Series 996-999

data.1 data.2 Modbus Address

Complete Parameter Download Sequence

When you download a complete set of parameters to a controller, you must load them in this order. The user's manual has more information about prompt interaction.

Table 7.1 -

Download Sequence

*IN1 *IN2

RTD1 RTD2 DFL

*CF

OT1A OT2A OT1B OT2B OT3 DEC1 RL1 RH1 CAL1 FTR1 DEC2 RL2 RH2 CAL2 FTR2 LIN2 ALT PRCA HY1A HY2A PRCB HY1B HY2B AL3

HYS3 LAT3 SIL3 AOUT PRC3 ARL ARH ACAL ERR EI1 ANUN FAIL ATSP RPA RTA RPB RTB A3LO A3HI PB1A RE1A IT1A RA1A DE1A CT1A PB2A RE2A IT2A RA2A DE2A

CT2A DBA PB1B RE1B IT1B RA1B DE1B CT1B PB2B RE2B IT2B RA2B DE2B CT2B DBB SP2A SP2B SPA SPB LOC SYS PIDA PIDB INPT OTPT GLBL COM DIAG CAL

ç

CAUTION: Entering commands out of sequence will produce unexpected results, because some prompts change the values of other prompts. Copy this page and use the checkboxes.

996, 997,

998

, 999

* Wait at least two seconds after executing this command before going on to the next command.

Command Summary Series 996-999, Chapter 7

Data Communications with the Watlow Series 988 Family

7.1

Dual Channel Controller Prompt Table

Command Summary Series 996-999 Data Communications

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2 Modbus

Table 7.2 -

A3HI to ARL

Address Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2 Modbus Address

A3HI Output 3 Alarm High ? <sp> A3HI<cr> Process: A3LO to sensor high range

341 = <sp> A3HI <sp> data.2 <cr> Deviation: 0 to 9999°

A3LO Output 3 Alarm Low ? <sp> A3LO <cr> Process: sensor low range to A3HI 340 = <sp> A3LO <sp> data.2 <cr> Deviation: -999 to 0°

ç

CAUTION: Avoid writing <=> continuously, such as ramping set points or repetitive loops, to the Series 996-999 EEPROM memory. Continuous writes may result in premature control failure, system downtime and

, 999

damage to processes and equipment.

998

NOTE: The number of

996, 997,

decimal places returned by many of these commands is determined by the DEC1, DEC2, IN1 or IN2 setting. (This does not apply to Modbus Protocol.)

ACAL Analog Offset ? <sp> ACAL <cr> -999 to 999°F

746 = <sp> ACAL <sp> data.2 <cr> -555 to 555°C

AL3 Alarm 3 Type ? <sp> AL3 <cr> 0 = Process Alarm, Input 2 (CH B) 736 = <sp> AL3 <sp> data.2 <cr> 1 = Deviation Alarm, Input 2 (CH B)

ALM Alarm Status ? <sp> ALM <cr> 0 = No alarms occurring (0000 0000) 110 (Writing a 0 clears = <sp> ALM <sp> 0 <cr> Bit 3 = A3LO (0000 0100)

next alarm.) Bit 4 = A3HI (0000 1000)

ALT Altitude ? <sp> ALT <cr> 0 = 0 1902 Compensation = <sp> ALT <sp> data.2 <cr> 1 = 2500 feet

AMB Ambient Terminal ? <sp> AMB <cr> Input 1 terminals in 0.0°F 1500 Temperature

ANUN Alarm Annunciation ? <sp> ANUN <cr> 0 = off 742 = <sp> ANUN <sp> data.2 <cr> 1 = on

AOUT Analog Output 3 ? <sp> AOUT <cr> 0 = Retransmit Process Channel A 743 Retransmit Function = <sp> AOUT <sp> data.2 <cr> 1 = Retransmit Set Point Channel A

ARH Retransmit ? <sp> ARH <cr> ARL to 9999 745 Range High = <sp> ARH <sp> data.2 <cr> Default: RH1 or RH2 per AOUT

ARL Retransmit ? <sp> ARL <cr> -999 to ARH 744 Range Low = <sp> ARL <sp> data.2 <cr> Default: RL1 or RL2 per AOUT

Default: RH or 999°

Default: RL or -999°

-999 to 999 units Default: 0°F, 0°C, 0 units

2 = Process Alarm, Input 1 (CH A) 3 = Deviation Alarm, Input 1 (CH A) Default: 2

110 = Alarm 3

0 = off 1 = HI 2 = LO

2 = 5000 feet default: 0

Default: on

2 = off 3 = Retransmit Process Channel B 4 = Retransmit Set Point Channel B Default: 0

7.2

Data Communications with the Watlow Series 988 Family Command Summary Series 996-999, Chapter 7

Dual Channel Controller Prompt Table

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2 Modbus Address

ATM Auto-Manual Key ? <sp> ATM <cr> 0 = Auto Mode Channels A and B

301 = <sp> ATM <sp> data.2 <cr> 1 = Manual Mode Chan. A, Auto Chan. B

2 = Manual Mode Chan. B, Auto Chan. A 3 = Manual Mode Channels A and B Default: n/a Disabled if LOC = 2 or 3

ATSP Auto-tune ? <sp> ATSP <cr> 50 to 150% 304 Set Point % = <sp> ATSP <sp> data.2 <cr> Default: 90%

AUT Auto-tune ? <sp> AUT <cr> 0 = No auto-tuning 305 = <sp> AUT <sp> data.2 <cr> 1 = Tune Channel A PID

2 = Tune Channel B PID Default: off

C1 Input 1 Value ? <sp> C1 <cr> Based on IN1 range ; RL1 to RH1 100

C2 Input 2 Value ? <sp> C2 <cr> Based on IN2 range ; RL2 to RH2 104

CAL Lockout ? <sp> CAL <cr> 0 = No lockout 1305 Calibration Menu = <sp> CAL <sp> data.2 <cr> 1 = Read only

2 = No read or write Default: 0

CAL1 Input 1 Calibration ? <sp> CAL1 <cr> -999°F to 999°F 605 Offset = <sp> CAL1 <sp> data.2 <cr> -555°C to 555°C

-999 Units to 999 Units Default: 0

CAL2 Input 2 Calibration ? <sp> CAL2 <cr> -999°F to 999°F 615 Offset = <sp> CAL2 <sp> data.2 <cr> -555°C to 555°C

-999 Units to 999 Units Default: 0

CF Degrees Select ? <sp> CF <cr> 0 = Display °F 901 Display Loop = <sp> CF <sp> data.2 <cr> 1 = Display °C

Default = 0

COM Lockout Comms ? <sp> COM <cr> 0 = No lockout 1312 Menu = <sp> COM <sp> data.2 <cr> 1 = Read only

2 = No read or write Default: 0

CT1A Cycle Time ? <sp> CT1A <cr> S.S. relay or open collector: 506 Output 1 PID = <sp> CT1A <sp> data.2 <cr> 0.9 = Burst firing, or

Channel A 1.0 to 999.9 sec. (Time prop)

Mech relay: 5.0 to 999.9 sec. Default: 1.0 or 30.0 sec.

CT1B Cycle Time ? <sp> CT1B <cr> S.S. relay or open collector: 526 Output 1 PID = <sp> CT1B <sp> data.2 <cr> 0.9 = Burst firing, or

Channel B 1.0 to 999.9 sec. (Time prop)

Mech relay: 5.0 to 999.9 sec. Default: 1.0 or 30.0 sec.

CT2A Cycle Time ? <sp> CT2A <cr> S.S. relay or open collector: 516 Output 2 PID = <sp> CT2A <sp> data.2 <cr> 0.9 = Burst firing, or

Channel A 1.0 to 999.9 sec. (Time prop)

Mech relay: 5.0 to 999.9 sec. Default: 1.0 or 30.0 sec.

CT2B Cycle Time ? <sp> CT2B <cr> S.S. relay or open collector: 536 Output 2 PID = <sp> CT2B <sp> data.2 <cr> 0.9 = Burst firing, or

Channel B 1.0 to 999.9 sec. (Time prop)

Mech relay: 5.0 to 999.9 sec. Default: 1.0 or 30.0 sec.

DATE Factory ? <sp> DATE <cr> xxyy 5 Test Date xx = Week

yy = Year

Table 7.3 -

ATM to DATE

ç

CAUTION: Avoid writing <=> continuously, such as ramping set points or repetitive loops, to the Series 996-999 EEPROM memory. Continuous writes may result in premature control failure, system downtime and damage to processes and equipment.

NOTE: The number of decimal places returned by many of these commands is determined by the DEC1, DEC2, IN1 or IN2 setting. (This does not apply to Modbus Protocol.)

996, 997,

998

, 999

Command Summary Series 996-999, Chapter 7

Data Communications with the Watlow Series 988 Family

7.3

Dual Channel Controller Prompt Table

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2 Modbus

Table 7.4 -

DBA to ER

ç

CAUTION: Avoid writing <=> continuously, such as ramping set points or repetitive loops, to the Series 996-999 EEPROM memory. Continuous writes may result in premature control failure, system downtime and damage to

, 999

processes and equipment.

998

NOTE: The number of

996, 997,

decimal places returned by many of these commands is determined by the DEC1, DEC2, IN1 or IN2 setting. (This does not apply to Modbus Protocol.)`

Address

DBA Deadband ? <sp> DBA <cr> -999°F to 999°F 505 PID Channel A = <sp> DBA <sp> data.2 <cr> -555°C to 555°C

DBB Deadband ? <sp> DBB <cr> -999°F to 999°F 525 PID Channel B = <sp> DBB <sp> data.2 <cr> -555°C to 555°C

DE1A Derivative ? <sp> DE1A <cr> 0.00 to 9.99 minutes 503 Output 1 PID = <sp> DE1A <sp> data.2 <cr> Default: 0.00

Channel A

DE1B Derivative ? <sp> DE1B <cr> 0.00 to 9.99 minutes 523 Output 1 PID = <sp> DE1B <sp> data.2 <cr> Default: 0.00

Channel B

DE2A Derivative ? <sp> DE2A <cr> 0.00 to 9.99 minutes 513 Output 2 PID = <sp> DE2A <sp> data.2 <cr> Default: 0.00

Channel A

DE2B Derivative ? <sp> DE2B <cr> 0.00 to 9.99 minutes 533 Output 2 PID = <sp> DE2B <sp> data.2 <cr> Default: 0.00

Channel B

DEC1 Decimal Point ? <sp> DEC1 <cr> 0 = Decimal point 0 606 Process Input 1 = <sp> DEC1 <sp> data.2 <cr> 1 = Decimal point 0.0

DEC2 Decimal Point ? <sp> DEC2 <cr> 0 = Decimal point 0 616 Process Input 2 = <sp> DEC2 <sp> data.2 <cr> 1 = Decimal point 0.0

DFL Default Unit Type ? <sp> DFL <cr> 0 = US units

900 = <sp> DFL <sp> data.2 <cr> 1 = Standard International units

DIAG Lockout ? <sp> DIAG <cr> 0 = No lockout 1313 Diagnostics Menu = <sp> DIAG <sp> data.2 <cr> 1 = Read only

EI1 Event Input 1 ? <sp> EI1 <cr> 0 = No 1060 Function = <sp> EI1 <sp> data.2 <cr> 1 = LOC

EI1S Event Input 1 Status ? <sp> EI1S <cr> 0 = off (open) 201 1 = on (closed)

ER Error, Analog Input ? <sp> ER <cr> 0 = No error 209 (Multiple errors 1 = Input 1 A-D overflow

possible.) 2 = Input 1 overrange

-999 units to 999 units Default: 0°F, 0°C, or 0 units

2 = Decimal point 0.00 3 = Decimal point 0.000 Default: 0

Default: 0

2 = No read or write Default: 0

2 = Alarm reset 3 = Toggle Auto/manual 4 = Turn control outputs off Default: No

3 = Input 1 underrange 4 = Input 1 A-D underflow 5 = Input 2 A-D overflow 6 = Input 2 overrange 7 = Input 2 underrange 8 = Input 2 A-D underflow 9 = Ambient error

7.4

Data Communications with the Watlow Series 988 Family Command Summary Series 996-999, Chapter 7

Dual Channel Controller Prompt Table

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2 Modbus Address

ER2 Error, ? <sp> ER2 <cr> 0 = No error n/a Communications 1 = Transmit buffer overflow

2 = Receive buffer overflow 3 = Framing error 4 = Overrun error 5 = Parity error 6 = Talking out of turn 7 = Invalid reply error 8 = Noise error 20 = Command not found 21 = Prompt not found 22 = Incomplete command line 23 = Invalid character 24 = Number of chars. overflow 25 = Input out of limit 26 = Read only command 27 = Write allowed only 28 = Prompt not active

ERR Error, ? <sp> ERR <cr> 0 = Errors latching 607 Latching Enable = <sp> ERR <sp> data.2 <cr> 1 = Errors non-latching

Default: 1

FAIL Sensor Failure ? <sp> FAIL <cr> Bumpless = LOP - 1% 902 Output Function = <sp> FAIL <sp> data.2 <cr> Heat/cool manual = -100 to 100%

Failure mode can be Heat only manual = 0% to 100% bumpless transfer Cool only manual = -100% to 0% or manual (% Power) Default: Bumpless control. See user’s manual, Error Code Actions.

FTR1 Process Input 1 ? <sp> FTR1 <cr> -60 to 60 seconds 604 Filter Time Constant = <sp> FTR1 <sp> data.2 <cr> Default: 0

FTR2 Process Input 2 ? <sp> FTR2 <cr> -60 to 60 seconds 614 Filter Time Constant = <sp> FTR2 <sp> data.2 <cr> Default: 0

GLBL Lockout ? <sp> GLBL <cr> 0 = No lockout 1311 Global Menu = <sp> GLBL <sp> data.2 <cr> 1 = Read only

2 = No read or write Default: 0

HY1A Output 1A Hysteresis ? <sp> HY1A <cr> 0°F to 999°F 507 = <sp> HY1A <sp> data.2 <cr> 0°C to 555°C

0 units to 999 units Default: 3°F, 2°C or 3 units

HY1B Output 1B Hysteresis ? <sp> HY1B <cr> 0°F to 999°F 527 = <sp> HY1B <sp> data.2 <cr> 0°C to 555°C

0 units to 999 units Default: 3°F, 2°C or 3 units

HY2A Output 2A Hysteresis ? <sp> HY2A <cr> 0°F to 999°F 517 = <sp> HY2A <sp> data.2 <cr> 0°C to 555°C

0 units to 999 units Default: 3°F, 2°C or 3 units

HY2B Output 2B Hysteresis ? <sp> HY2B <cr> 0°F to 999°F 537 = <sp> HY2B <sp> data.2 <cr> 0°C to 555°C

0 units to 999 units Default: 3°F, 2°C or 3 units

HYS3 Output 3 Hysteresis ? <sp> HYS3 <cr> 0°F to 999°F 737 = <sp> HYS3 <sp> data.2 <cr> 0°C to 555°C

0 units to 999 units Default: 3°F, 2°C or 3 units

Table 7.5 -

ER2 to HYS3

ç

CAUTION: Avoid writing <=> continuously, such as ramping set points or repetitive loops, to the Series 996-999 EEPROM memory. Continuous writes may result in premature control failure, system downtime and damage to processes and equipment.

NOTE: The number of decimal places returned by many of these commands is determined by the DEC1, DEC2, IN1 or IN2 setting. (This does not apply to Modbus Protocol.)

996, 997,

998, 999

Command Summary Series 996-999, Chapter 7

Data Communications with the Watlow Series 988 Family

7.5

Dual Channel Controller Prompt Table

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2 Modbus

Table 7.6 -

IN1 to INPT

Address

IN1 Input 1 Type ? <sp> IN1 <cr> 1 = J t/c; 32 to 1500°F/0 to 816°C

601 = <sp> IN1 <sp> data.2 <cr> 2 = K t/c; -328 to 2500°F/-200 to 1371°C

(Caution: Writing to 3 = T t/c; -328 to 750°F/-200 to 399°C IN1 resets most 4 = N t/c; 32 to 2372°F/0 to 1300°C prompts to their 5 = E t/c; -328 to 1470°F/-200 to 799°C default state.) 6 = C t/c (W3); 32 to 4200°F 0 to 2316°C

ç

CAUTION: Avoid writing <=> continuously, such as ramping set points or repetitive loops, to the Series 996-999 EEPROM memory. Continuous writes may result in premature control failure, system downtime and damage to processes and equipment.

998, 999

NOTE: The number of decimal places returned by many

996, 997,

of these commands is determined by the DEC1, DEC2, IN1 or IN2 setting.

NOTE: (RTD setting) For JIS curve, go to rtd1 prompt after selecting In1.

IN2 Input 2 Type ? <sp> IN2 <cr> 0 = t/c Low Gain off

611 = <sp> IN2 <sp> data.2 <cr> 1 = J t/c; 32 to 1500°F/0 to 816°C

(Caution: Writing to 2 = K t/c; -328 to 2500°F/-200 to 1371°C IN2 resets most 3 = T t/c; -328 to 750°F/-200 to 399°C prompts to their 4 = N t/c; 32 to 2372°F/0 to 1300°C default states.) 5 = E t/c; -328 to 1470°F/-200 to 799°C

INPT Lockout Input Menu ? <sp> INPT <cr> 0 = No input menu lockout 1309 = <sp> INPT <sp> data.2 <cr> 1 = Read only

7 = D t/c (W5); 32 to 4200°F/0 to 2316°C 8 = Pt 2; 32 to 2543°F/0 to 1395°C 10 = R t/c; 32 to 3200°F/0 to 1760°C 11 = S t/c; 32 to 3200°F/0 to 1760°C 12 = B t/c; 1598 to 3300°F/870 to 1816°C 14 = 1° RTD (DIN); -328 to 1472°F/

-200 to 800°C

15 = 0.1° RTD (DIN); -99.9 to 999.9°F/

-99.9 to 700.0°C 17 = 4-20mA; -999 to 9999 units 18 = 0-20mA; -999 to 9999 units 19 = 0-5VÎ (dc); -999 to 9999 units 20 = 1-5VÎ (dc); -999 to 9999 units 21 = 0-10VÎ (dc); -999 to 9999 units 23 = 0-50mVÎ (dc); -999 to 9999 units 24 = 0-100mVÎ (dc); -999 to 9999 units

6 = C t/c (W3); 32 to 4200°F 0 to 2316°C 7 = D t/c (W5); 32 to 4200°F/0 to 2316°C 8 = Pt 2; 32 to 2543°F/0 to 1395°C 10 = R t/c; 32 to 3200°F/0 to 1760°C 11 = S t/c; 32 to 3200°F/0 to 1760°C 12 = B t/c; 1598 to 3300°F/870 to 1816°C 14 = 1° RTD (DIN); -328 to 1472°F/

-200 to 800°C 15 = 0.1° RTD (DIN); -99.9 to 999.9°F/

-99.9 to 700.0°C 17 = 4-20mA; -999 to 9999 units 18 = 0-20mA; -999 to 9999 units 19 = 0-5VÎ (dc); -999 to 9999 units 20 = 1-5VÎ (dc); -999 to 9999 units 21 = 0-10VÎ (dc); -999 to 9999 units 23 = 0-50mVÎ (dc); -999 to 9999 units 24 = 0-100mVÎ (dc); -999 to 9999 units

2 = No read or write allowed Default: 0

7.6

Data Communications with the Watlow Series 988 Family Command Summary Series 996-999, Chapter 7

Dual Channel Controller Prompt Table

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2 Modbus Address

IT1A Integral for Output 1 ? <sp> IT1A <cr> 0.00 to 99.99 minutes per repeat 501 PID Channel A = <sp> IT1A <sp> data.2 <cr> Default: 0.00 minutes per repeat

IT1B Integral for Output 1 ? <sp> IT1B <cr> 0.00 to 99.99 minutes per repeat 521 PID Channel B = <sp> IT1B <sp> data.2 <cr> Default: 0.00 minutes per repeat

IT2A Integral for Output 2 ? <sp> IT2A <cr> 0.00 to 99.99 minutes per repeat 511 PID Channel A = <sp> IT2A <sp> data.2 <cr> Default: 0.00 minutes per repeat

IT2B Integral for Output 2 ? <sp> IT2B <cr> 0.00 to 99.99 minutes per repeat 531 PID Channel B = <sp> IT2B <sp> data.2 <cr> Default: 0.00 minutes per repeat

ITY1 Input 1 ? <sp> ITY1 <cr> 0 = None

8 Hardware Type 1 = t/c only

4 = Input off 5 = Universal RTD 6 = Universal high gain t/c 7 = Universal low gain t/c 8 = Universal millivolts 9 = Universal process

ITY2 Input 2 ? <sp> ITY2 <cr> 0 = None 9 Hardware Type 1 = t/c only

4 = Input off 5 = Universal RTD 6 = Universal high gain t/c 7 = Universal low gain t/c 8 = Universal millivolts 9 = Universal process

LAT3 Alarm 3 Latching ? <sp> LAT3 <cr> 0 = Latching alarms 738 = <sp> LAT3 <sp> data.2 <cr> 1 = Non-latching alarms

Default: 1

LIN2 Linearization ? <sp> LIN2 <cr> 0 = None 618 Process Input 2 = <sp> LIN2 <sp> data.2 <cr> 1 = Wet bulb

2 = Vaisala HMM-30C 3 = Rotronic H260 Default: 0

LOC Keyboard Lockout ? <sp> LOC <cr> 0 = No lockout 1300 = <sp> LOC <sp> data.2 <cr> 1 = Lock out mode key

2 = Lock out mode & auto/man keys 3 = Lock out all single keys Default: 0

MDL Model Number ? <sp> MDL <cr> 998 (996 - 999 dual channel unit) 0

MOD Mode Key Action = <sp> MOD <sp> 1 <cr> 0 = Mode to previous prompt 1900 1 = Mode to next prompt

OT1A Output 1 Channel A ? <sp> OT1A <cr> 0 = Heat 700 Action = <sp> OT1A <sp> data.2 <cr> 1 = Cool

2 = None

OT1B Output 1 Channel B ? <sp> OT1B <cr> 0 = Heat 717 Action = <sp> OT1B <sp> data.2 <cr> 1 = Cool

2 = None

OT2A Output 2 Channel A ? <sp> OT2A <cr> 0 = Heat 716 Action = <sp> OT2A <sp> data.2 <cr> 1 = Cool

2 = None

OT2B Output 2 Channel B ? <sp> OT2B <cr> 0 = Heat 733 Action = <sp> OT2B <sp> data.2 <cr> 1 = Cool

2 = None

OT3 Output 3 Action ? <sp> OT3 <cr> 0 = None 734 = <sp> OT3 <sp> data.2 <cr> 1 = Alarm 3

2 = Alarm 3 reverse acting

Table 7.7 -

IT1A to OT3

ç

CAUTION: Avoid writing <=> continuously, such as ramping set points or repetitive loops, to the Series 996-999 EEPROM memory. Continuous writes may result in premature control failure, system downtime and damage to processes and equipment.

NOTE: The number of decimal places returned by many of these commands is determined by the DEC1, DEC2, IN1 or IN2 setting. (This does not apply to Modbus Protocol.)

996, 997,

998, 999

Command Summary Series 996-999, Chapter 7

Data Communications with the Watlow Series 988 Family

7.7

Dual Channel Controller Prompt Table

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2 Modbus

Table 7.8 -

OT3S to PB2B

ç

CAUTION: Avoid writing <=> continuously, such as ramping set points or repetitive loops, to the Series 996-999 EEPROM memory. Continuous writes may result in premature control failure, system downtime and damage to processes and equipment.

998, 999

NOTE: The number of

996, 997,

decimal places returned by many of these commands is determined by the DEC1, DEC2, IN1 or IN2 setting. (This does not apply to Modbus Protocol.)

Address

OT3S Output 3 Status ? <sp> OT3S <cr> 0 = off

1903 1 = on OTPT Lockout Output ? <sp> OTPT <cr> 0 = No lockout

1310 Menu = <sp> OTPT <sp> data.2 <cr> 1 = Read only

OTY1 Output 1 Hardware ? <sp> OTY1 <cr> 0 = None 16 OTY2 Output 2 Hardware ? <sp> OTY2 <cr> 1 = SSR 0.5A 17 OTY3 Output 3 Hardware ? <sp> OTY3 <cr> 2 = SSR 0.5A with suppression 18 OTY4 Output 4 Hardware ? <sp> OTY4 <cr> 5 = Dual SSR Form A 19 6 = Switched dc

PB1A Proportional Band ? <sp> PB1A <cr> if DFL = 0 and CF = 1, then 0 to 555°C 500 Output 1 PID = <sp> PB1A <sp> data.2 <cr> if DFL = 0 and CF = 0, then 0 to 999°F

Channel A if DFL = 0 and IN1 = a process value,

PB1B Proportional Band ? <sp> PB1B <cr> if DFL = 0 and CF = 1, then 0 to 555°C 520 Output 1 PID = <sp> PB1B <sp> data.2 <cr> if DFL = 0 and CF = 0, then 0 to 999°F

Channel B if DFL = 0 and IN1 = a process value,

PB2A Proportional Band ? <sp> PB2A <cr> if DFL = 0 and CF = 1, then 0 to 555°C 510 Output 2 PID = <sp> PB2A <sp> data.2 <cr> if DFL = 0 and CF = 0, then 0 to 999°F

Channel A if DFL = 0 and IN1 = a process value,

PB2B Proportional Band ? <sp> PB2B <cr> if DFL = 0 and CF = 1, then 0 to 555°C 530 Output 2 PID = <sp> PB2B <sp> data.2 <cr> if DFL = 0 and CF = 0, then 0 to 999°F

Channel B if DFL = 0 and IN1 = a process value,

2 = No read or write Default: 0

7 = Dual Switched dc 8 = Relay 5A Form C 9 = Relay 5A Form C with suppression 10 = Relay 5A Form A/B 11 = Relay 5A Form A/B with suppres-

sion 12 = Dual Relay Form A 13 = Process output 14 = Voltage retransmit 15 = Current retransmit 16 = Power supply 17 = Comms EIA-232 18 = Comms EIA -485 / EIA 422 19 = Comms EIA -485 / EIA-232

then 0 to 999 units if DFL = 1, then 0.0 to 99.9% of span Default: 25°F, 14°C, 25 units, or 3.0%

7.8

Data Communications with the Watlow Series 988 Family Command Summary Series 996-999, Chapter 7

Dual Channel Controller Prompt Table

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2 Modbus Address

PIDA Lockout Channel A ? <sp> PIDA <cr> 0 = No lockout

1307 PID Menu = <sp> PIDA <sp> data.2 <cr> 1 = Read only

2 = No read or write Default: 0

PIDB Lockout Channel B ? <sp> PIDB <cr> 0 = No lockout 1308 PID Menu = <sp> PIDB <sp> data.2 <cr> 1 = Read only

2 = No read or write Default: 0

PRCA Process Range ? <sp> PRCA <cr> 0 = 4-20mA 701 Output Channel A = <sp> PRCA <sp> data.2 <cr> 1 = 0-20mA

2 = 0-5VÎ (dc) 3 = 1-5VÎ (dc) 4 = 0-10VÎ (dc) Default: 0

PRCB Process Range ? <sp> PRCB <cr> 0 = 4-20mA 718 Output Channel B = <sp> PRCB <sp> data.2 <cr> 1 = 0-20mA

2 = 0-5VÎ (dc) 3 = 1-5VÎ (dc) 4 = 0-10VÎ (dc) Default: 0

PRC3 Process Range ? <sp> PRC3 <cr> 0 = 4-20mA 735 Output 3 = <sp> PRC3 <sp> data.2 <cr> 1 = 0-20mA

2 = 0-5VÎ (dc) 3 = 1-5VÎ (dc) 4 = 0-10VÎ (dc) Default: 0

RA1A Rate Output 1 ? <sp> RA1A <cr> 0.00 to 9.99 minutes 504 PID Channel A = <sp> RA1A <sp> data.2 <cr> Default: 0.00

RA1B Rate Output 1 ? <sp> RA1B <cr> 0.00 to 9.99 minutes 524 PID Channel B = <sp> RA1B <sp> data.2 <cr> Default: 0.00

RA2A Rate Output 2 ? <sp> RA2A <cr> 0.00 to 9.99 minutes 514 PID Channel A = <sp> RA2A <sp> data.2 <cr> Default: 0.00

RA2B Rate Output 2 ? <sp> RA2B <cr> 0.00 to 9.99 minutes 534 PID Channel B = <sp> RA2B <sp> data.2 <cr> Default: 0.00

RE1A Reset Output 1 ? <sp> RE1A <cr> 0.00 to 9.99 repeats/minute 502 PID Channel A = <sp> RE1A <sp> data.2 <cr> Default: 0.10 repeats/minute

RE1B Reset Output 1 ? <sp> RE1B <cr> 0.00 to 9.99 repeats/minute 522 PID Channel B = <sp> RE1B <sp> data.2 <cr> Default: 0.10 repeats/minute

RE2A Reset Output 2 ? <sp> RE2A <cr> 0.00 to 9.99 repeats/minute 512 PID Channel A = <sp> RE2A <sp> data.2 <cr> Default: 0.10 repeats/minute

RE2B Reset Output 2 ? <sp> RE2B <cr> 0.00 to 9.99 repeats/minute 532 PID Channel B = <sp> RE2B <sp> data.2 <cr> Default: 0.10 repeats/minute

RH1 Range High ? <sp> RH1 <cr> min. IN1 range to to max. IN1 range 603 Input 1 = <sp> RH1 <sp> data.2 <cr> Default: Sensor high range

RH2 Range High ? <sp> RH2 <cr> min. IN2 range to to max. IN2 range 613 Input 2 = <sp> RH2 <sp> data.2 <cr> Default: Sensor high range

RL1 Range Low ? <sp> RL1 <cr> min. IN1 range to to max. IN1 range 602 Input 1 = <sp> RL1 <sp> data.2 <cr> Default: Sensor low range

RL2 Range Low ? <sp> RL2 <cr> min. IN2 range to to max. IN2 range 612 Input 2 = <sp> RL2 <sp> data.2 <cr> Default: Sensor low range

Table 7.9 -

PIDA to RL2

ç

CAUTION: Avoid writing <=> continuously, such as ramping set points or repetitive loops, to the Series 996-999 EEPROM memory. Continuous writes may result in premature control failure, system downtime and damage to processes and equipment.

NOTE: The number of decimal places returned by many of these commands is determined by the DEC1, DEC2, IN1 or IN2 setting. (This does not apply to Modbus Protocol.)

996, 997,

998, 999

Command Summary Series 996-999, Chapter 7

Data Communications with the Watlow Series 988 Family

7.9

Dual Channel Controller Prompt Table

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2 Modbus

Table 7.10 -

RPA to SYS

ç

CAUTION: Avoid writing <=> continuously, such as ramping set points or repetitive loops, to the Series 996-999 EEPROM memory. Continuous writes may result in premature control failure, system downtime and damage to processes and equipment.

998, 999

NOTE: The number of

996, 997,

decimal places returned by many of these commands is determined by the DEC1, DEC2, IN1 or IN2 setting. (This does not apply to Modbus Protocol.)

Address

RPA Ramping Initiation ? <sp> RPA <cr> 0 = off 1100 Channel A = <sp> RPA <sp> data.2 <cr> 1 = On startup

RPB Ramping Initiation ? <sp> RPB <cr> 0 = off 1104 Channel B = <sp> RPB <sp> data.2 <cr> 1 = On startup

RTA Ramp Rate ? <sp> RTA <cr> 0 to 9999°/minute 1101 Channel A = <sp> RTA <sp> data.2 <cr> Default: 100°/minute

RTB Ramp Rate ? <sp> RTB <cr> 0 to 9999°/minute 1105 Channel B = <sp> RTB <sp> data.2 <cr> Default: 100°/minute

RTD1 RTD Calibration ? <sp> RTD1 <cr> 0 = JIS 609 Curve Input 1 = <sp> RTD1 <sp> data.2 <cr> 1 = DIN

RTD2 RTD Calibration ? <sp> RTD2 <cr> 0 = JIS 619 Curve Input 2 = <sp> RTD2 <sp> data.2 <cr> 1 = DIN

SIL3 Alarm 3 Silence ? <sp> SIL3 <cr> 0 = off / disabled

739 = <sp> SIL3 <sp> data.2 <cr> 1 = on / enabled

SRNB Serial Number ? <sp> SRNB <cr> xxxx = 2 Bottom Display 0000 to 9999

Read the six-digit unit serial number in two segments, "SNxx" and "xxxx," i.e., as in the upper and lower front panel displays.

SRNT Serial Number ? <sp> SRNT <cr> SNxx = 1 Top Display 00 to 99

SOFT Software Revision ? <sp> SOFT <cr> 0 = Rev A 7 = Rev H 4 1 = Rev B 8 = Rev I

SPA Set Point Channel A ? <sp> SPA <cr> RL1 to RH1 300 = <sp> SPA <sp> data.2 <cr> Default: per IN1 and hardware

SPB Set Point Channel B ? <sp> SPB <cr> RL2 to RH2 319 = <sp> SPB <sp> data.2 <cr> Default: per IN1 and hardware

SP2A Set Point 2 ? <sp> SP2A <cr> RL1 to RH1 309 Channel A = <sp> SP2A <sp> data.2 <cr> Default: per input range

Heat/Heat or Cool/Cool Only

SP2B Set Point 2 ? <sp> SP2B <cr> RL2 to RH2 328 Channel B = <sp> SP2B <sp> data.2 <cr> Default: per input range

Heat/Heat or Cool/Cool Only

SYS Lockout System ? <sp> SYS <cr> 0 = No lockout 1306 Menu = <sp> SYS <sp> data.2 <cr> 1 = Read only

2 = On startup and set point change Default: 0

Default: 1

Default: 0

2 = Rev C 9 = Rev J 3 = Rev D 10 = Rev K 4 = Rev E 11 = Rev L 5 = Rev F 12 = Rev M 6 = Rev G 13 = Rev N

etc.

2 = No read or write Default: 0

7.10

Data Communications with the Watlow Series 988 Family Command Summary Series 996-999, Chapter 7

Dual Channel Controller Prompt Table

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2 Modbus Address

TOUT Test Outputs = <sp> TOUT <sp> data.2 <cr> 0 = All off

1514 1 = Output 1A on

2 = Output 2A on 3 = Output 1B on 4 = Output 2B on 5 = Output 3 on 6 = Output 4 on

Table 7.11 -

SYS to TOUT

ç

CAUTION: Avoid writing <=> continuously, such as ramping set points or repetitive loops, to the Series 996-999 EEPROM memory. Continuous writes may result in premature control failure, system downtime and damage to processes and equipment.

996, 997,

NOTE: The number of decimal places returned by many of these commands is determined by the DEC1, DEC2, IN1 or IN2 setting. (This does not apply to Modbus Protocol.)

998

, 999

Command Summary Series 996-999, Chapter 7

Data Communications with the Watlow Series 988 Family

7.11

Dual Channel Controller Prompt Table

Name Description Read (?) and/or Write (=) Syntax Range data.1 data.2 Modbus Address

Table 7.12 - 998 Modbus RTU Addresses

Table 7.12 -

Modbus RTU Addresses

, 999

998

996, 997,

Relative

Address Absolute Address Parameter

40001 0 MDL (998) 40002 1 SRNT 40003 2 SRNB 40005 4 SOFT 40006 5 DATE 40009 8 ITY1 40010 9 ITY2 40017 16 OTY1 40018 17 OTY2 40019 18 OTY3 40020 19 OTY4 40025 24 SPEE 40101 100 C1 40105 104 C2 40111 110 ALM 40202 201 EI1S 40210 209 ER 40301 300 SPA 40302 301 ATM 40305 304 ATSP 40306 305 AUT 40310 309 SP2A 40320 319 SPB 40329 328 SP2B 40341 340 A3LO 40342 341 A3HI 40501 500 PB1A 40502 501 IT1A 40503 502 RE1A 40504 503 DE1A 40505 504 RA1A 40506 505 DBA 40507 506 CT1A 40508 507 HY1A 40511 510 PB2A 40512 511 IT2A 40513 512 RE2A 40514 513 DE2A 40515 514 RA2A

Relative

Address Absolute Address Parameter

40517 516 CT2A 40518 517 HY2A 40521 520 PB1B 40522 521 IT1B 40523 522 RE1B 40524 523 DE1B 40525 524 RA1B 40526 525 DBB 40527 526 CT1B 40528 527 HY1B 40531 530 PB2B 40532 531 IT2B 40533 532 RE2B 40534 533 DE2B 40535 534 RA2B 40537 536 CT2B 40538 537 HY2B 40602 601 IN1 40603 602 RL2 40604 603 RH1 40605 604 FTR1 40606 605 CAL1 40607 606 DEC1 40608 607 ERR 40610 609 RTD1 40612 611 IN2 40613 612 RL2 40614 613 RH2 40615 614 FTR2 40616 615 CAL2 40617 616 DEC2 40619 618 LIN2 40620 619 RTD2 40701 700 OT1A 40702 701 PRCA 40717 716 OT2A 40718 717 OT1B 40719 718 PRCB 40734 733 OT2B

Relative

Address Absolute Address Parameter

40735 734 OT3 40737 736 AL3 40738 737 HYS3 40739 738 LAT3 40740 739 SIL3 40743 742 ANUN 40736 735 PRC3 40744 743 AOUT 40745 744 ARL 40746 745 ARH 40747 746 ACAL 40901 900 DFL 40902 901 C F 40903 902 FAIL 41061 1060 EI1 41101 1100 RPA 41102 1101 RTA 41105 1104 RPB 41106 1105 RTB 41301 1300 LOC 41306 1305 CAL 41307 1306 SYS 41308 1307 PIDA 41309 1308 PIDB 41310 1309 INPT 41311 1310 OTPT 41312 1311 GLBL 41313 1312 COM 41314 1313 DIAG 41501 1500 AMB 41515 1514 TOUT 41901 1900 MOD 41902 1901 DISP 41903 1902 ALT 41904 1903 OT3S

7.12

Data Communications with the Watlow Series 988 Family Command Summary Series 996-999, Chapter 7

Appendix

Errors

Handling Communication Error Codes (ER2)

All communications-related error codes are ER2 error codes, that is, they are not considered cause for a shutdown of the unit itself. There is always a communications error code generated when a <NAK> character is sent under ANSI X3.28 protocol. With XON/XOFF flow control, error codes may be generated, but there will be no standard indication of this fact.

When your message is "not acknowledged" (NAK) in EIA-422 or EIA-485 with ANSI X3.28 Protocol, you may clear ER2 codes by reading it. Use the " ? <sp> ER2 <cr>" command.

Then try the message again; you may have made a syntax error. See the ER2 error code list in Chapters 5, 6 and 7.

With XON/XOFF protocol and the EIA-232 interface, the Series 981-984, 986-989 and 996-999 sends no feedback on commands. Therefore, you may want to query the status of ER2 after each command you send.

User Responsibility ç

Users must refrain from altering prompts that do not appear on the controller's front panel or are not included on the specific model. For example, do not send an A2LO command to a unit not equipped with an alarm for output 2.

Warranty

The Watlow Series 988 family of controllers is warranted to be free of defects in material and workmanship for 36 months after delivery to the first purchaser for use, providing that the units have not been misapplied. Since Watlow has no control over their use, and sometimes misuse, we cannot guarantee against failure. Watlow's obligations hereunder, at Watlow's option, are limited to replacement, repair or refund of purchase price, and parts which upon examination prove to be defective within the warranty period specified. This warranty does not apply to damage resulting from transportation, alteration, misuse or abuse.

ç

CAUTION: Sending commands to a particular controller for which it is not equipped may cause damage to equipment and/or processes.

ç

CAUTION: Avoid writing <=> continuously, such as ramping set points or repetitive loops, to the controller's EEPROM memory. Continuous writes may result in premature control failure, system downtime and damage to processes and equipment.

Appendix

Data Communications with the Watlow Series 988 Family

A.1

ASCII

Table A.2a ASCII Character Set.

ASCII Character Set

Dec Hex Char Dec Hex Char Dec Hex Char Dec Hex Char

00 00 NUL 16 10 DLE 32 20 SP 48 30 0 01 01 SOH 17 11 DC1 33 21 ! 49 31 1 02 02 STX 18 12 DC2 34 22 " 50 32 2 03 03 ETX 19 13 DC3 35 23 # 51 33 3 04 04 EOT 20 14 DC4 36 24 $ 52 34 4 05 05 ENQ 21 15 NAK 37 25 % 53 35 5 06 06 ACK 22 16 SYN 38 26 & 54 36 6 07 07 BEL 23 17 ETB 39 27 ' 55 37 7 08 08 BS 24 18 CAN 40 28 ( 56 38 8 09 09 HT 25 19 EM 41 29 ) 57 39 9 10 0A LF 26 1A SUB 42 2A * 58 3A : 11 0B VT 27 1B ESC 43 2B + 59 3B ; 12 0C FF 28 1C FS 44 2C , 60 3C < 13 0D CR 29 1D GS 45 2D - 61 3D = 14 0E SO 30 1E RS 46 2E . 62 3E > 15 0F SI 31 1F US 47 2F / 63 3F ?

Dec Hex Char Dec Hex Char Dec Hex Char Dec Hex Char

64 40 @ 80 50 P 96 60 ` 112 70 p 65 41 A 81 51 Q 97 61 a 113 71 q 66 42 B 82 52 R 98 62 b 114 72 r 67 43 C 83 53 S 99 63 c 115 98 s 68 44 D 84 54 T 100 64 d 116 74 t 69 45 E 85 55 U 101 65 e 117 75 u 70 46 F 86 56 V 102 66 f 118 76 v 71 47 G 87 57 W 103 67 g 119 77 w 72 48 H 88 58 X 104 68 h 120 78 x 73 49 I 89 59 Y 105 69 i 121 79 y 74 4A J 90 5A Z 106 6A j 122 7A z 75 4B K 91 5B [ 107 6B k 123 7B { 76 4C L 92 5C \ 108 6C l 124 7C | 77 4D M 93 5D ] 109 6D m 125 7D } 78 4E N 94 5E ^ 110 6E n 126 7E ~ 79 4F O 95 5F _ 111 6F o 127 7F DEL

Table A.2b ASCII Control Characters (Partial Set).

A.2

ASCII Control Characters (Partial Set)

ASCII Ctrl Key Definition Dec. Hex. Char. Equiv. Equiv. Equiv. ENQ Ctrl E Enquiry 5 05 ACK Ctrl F Acknowledge 6 06 NAK Ctrl U Neg. Acknowledge 21 15 STX Ctrl B Start of Text 2 02 ETX Ctrl C End of Text 3 03 EOT Ctrl D End of Transmission 4 04 DLE Ctrl P Data Link Escape 16 10 CR Ctrl M Carriage Return 13 0D DC1 Ctrl Q XON 17 11 DC3 Ctrl S XOFF 19 13

Data Communications with the Watlow Series 988 Family Appendix

Symbols + 4.1

- 4.1 < > 4.1, 4.2 <cr> 4.2 <space> 4.2 = Command 4.1-4.3, 4.5 ? Command 4.1, 4.3, 4.5

[[

[``7E] 3.2

[[ [``7o] 3.2 [``8n] 3.2 [Addr] 3.2 [bAUd] 3.2 [COM] 3.2

[dAtA] 3.2 [FULL] 3.2 [IntF] 3.2 [Mod] 3.2 [``On] 3.2 [Prot] 3.2 [`SEt] 3.2

A A2LO A.1

Abort Set Point 5.3 ACK 1.6-1.7 acknowledge <ACK> 1.6-1.7 Action

Output 1

981-984 [OT1] 5.8 986-989 [OT1] 6.13 996-999 [OT1A], [OT1B] 7.7

Output 2

981-984 [OT2] 5.8 986-989 [OT2] 6.13 996-999 [OT2A], [OT2B] 7.7

address prompt 3.1, 4.4

[Addr] 3.2

Alarm

Annunciation [ANUN]

981-984 5.4 986-989 6.8 996-999 7.2

Status [ALM]

981-984 5.3 986-989 6.7 996-999 7.2

Alarm 2

Latching [LAT2]

981-984 5.7 986-989 6.13

Silence [SIL2]

981-984 5.10 986-989 6.16

Type [AL2]

981-984 5.3 986-989 6.7

Alarm 3

Latching [LAT3]

981-984 5.7 986-989 6.13 996-999 7.7

Silence [SIL3]

981-984 5.10 986-989 6.16 996-999 7.10

Type [AL3]

981-984 5.3

986-989 6.7 996-999 7.2

Algorithm [ALGO]

986-989 6.7

Altitude Compensation [ALT]

996-999 7.2

Ambient Terminal Temperature [AMB]

981-984 5.3 986-989 6.8 996-999 7.2

Analog

Offset [ACAL]

986-989 6.7 996-999 7.2

Output 3 Retransmit [AOUT]

981-984 5.4 986-989 6.8 996-999 7.2

ANSI X3.28 Protocol 3.1-3.2, 4.1-4.5,

A.1 ANSI X3.28 Protocol rules 4.3-4.5 ASCII characters 1.4, 4.1, A.2 ASCII control characters A.2 Auto-Manual Key [ATM]

986-989 6.8 996-999 7.3

Auto-tune [AUT]

981-984 5.4 986-989 6.8 996-999 7.3

Auto-tune Set Point % [ATSP]

981-984 5.4 986-989 6.8 996-999 7.3

B baud rate 1.5, 3.2

[bAUd] 3.2

Black Box 2.1 brackets [ < > ] 4.1 Burr Brown LDM 422A converter 2.4 Burr-Brown 2.1 bus 1.2

C Calibration Menu Lockout [CAL]

986-989 6.8 996-999 7.3

Calibration Offset

Retransmit Output [ACAL]

981-984 5.3

Input 1 [CAL1]

981-984 5.4

986-989 6.8

996-999 7.3

Input 2 [CAL2]

981-984 5.4

986-989 6.8

996-999 7.3

Carriage Return < cr > 4.2 Cascade Action [CSAC] 6.8 Channel A PID Lockout [PIDA]

996-999 7.9

Channel B PID Lockout [PIDB]

996-999 7.9

character set A.2 COM Menu [COM] 3.2

Prompts 3.2

command list 4.1 Comms Menu Lockout [COM]

Index

986-989 6.8 996-999 7.3

communications software 3.1 Communications Menu 2.1 connecting 3.1 control character definitions 1.6 control characters 1.4, A.2 Control Function [CNTL]

986-989 6.8

Current Profile Set Point [CSP]

981-984 5.4

Cyclical Redundancy Checksum

(CRC) 6.1-6.3, 6.5

algorithm 6.5

Cycle Time

Output 1 [CT1]

981-984 5.4

Output 1 PID [CT1A], [CT1B]

986-989 6.8, 6.9 996-999 7.3

Output 2 [CT2]

981-984 5.4

Output 2 PID [CT2A], [CT2B]

986-989 6.9 996-999 7.3

D data bits [dAtA] 3.2 data fields 4.1 Data Link Escape <DLE> 1.4 data rules 4.1 data.n 4.1 Dead Band PID

981-984 [DB] 5.4 986-989 [DBA], [DBB] 6.9 996-999 [DBA], [DBB] 7.4

Decimal Point

Input 1 [DEC1]

981-984 5.5 986-989 6.9 996-999 7.4

Input 2 [DEC2]

986-989 6.9 996-999 7.4

Default Unit Type [DFL]

981-984 5.5 986-989 6.9 996-999 7.4

Degrees Select Display Loop [CF]

981-984 5.4 986-989 6.8 996-999 7.3

delay 5.1, 6.6, 7.1 Derivative PID

Output 1

981-984 [DE1] 5.4 986-989 [DE1A], [DE1B] 6.9 996-999 [DE1A], [DE1B] 7.4

Output 2

981-984 [DE2] 5.5 986-989 [DE2A], [DE2B] 6.9 996-999 [DE2A], [DE2B] 7.4

device address 4.4 Diagnostics Menu Lockout [DIAG]

986-989 6.9 996-999 7.4

DISPLAY key 1.6

Appendix

Data Communications with the Watlow Series 988 Family

A.3

Index

DLE 1.6-1.7 download sequence

981-984 5.1 986-989 6.6 996-999 7.1

E EIA-232 1.3, 2.1, 4.2

EIA-422 1.3, 2.1, A.1 EIA-422 wiring 2.4 EIA-485 1.3, 2.1, A.1 EIA-485 wiring 2.3 Elapsed Jump Count [EJC]

981-984 5.5

End of Text <ETX> 1.6-1.7, 4.2 End of Transmission <EOT> 1.6-1.7 End Set Point [ENSP]

981-984 5.5

ENQ 1.6-1.7 enquiry <ENQ> 1.7 EOT 1.6-1.7 ER2 A.1 Error

Analog Input [ER]

981-984 5.5 986-989 6.10

996-999 7.4 Codes A.1 Communications [ER2]

981-984 5.6

986-989 6.10

996-999 7.5 Latching Enable [ERR]

981-984 5.6

986-989 6.10

996-999 7.5

establish communications 4.5 ETX 1.6-1.7, 4.2 even parity 1.5 Event 3 Output State [ENT3]

981-984 5.5

Event 4 Output State [ENT4]

981-984 5.5

Event Input 1

Function [EI1]

981-984 5.5

986-989 6.10

996-999 7.4 Status [EI1S]

981-984 5.5

986-989 6.10

996-999 7.4

Event Input 2

Function [EI2]

981-984 5.5

986-989 6.10 Status [EI2S]

981-984 5.5

986-989 6.10

example format 4.2 F

Factory Test Date [DATE]

981-984 5.4 986-989 6.9

996-999 7.3

Filter Time Constant

981-984 [FTR1] 5.6 986-989 [FTR1], [FTR2] 6.11 996-999 [FTR1], [FTR2] 7.5

flow control 4.2 front panel, controller 3.2

G Global Menu Lockout [GLBL]

986-989 6.11 996-999 7.5

Guaranteed Soak Deviation [GSD]

981-984 5.6

H Hardware Type

Input 1 [ITY1]

981-984 5.7 986-989 6.12 996-999 7.7

Input 2 [ITY2]

981-984 5.7 986-989 6.13 996-999 7.7

Output 1 [OTY1]

981-984 5.9 986-989 6.14 996-999 7.8

Output 2 [OTY2]

981-984 5.9 986-989 6.14 996-999 7.8

Output 3 [OTY3]

981-984 5.9 986-989 6.14 996-999 7.8

Output 4 [OTY4]

981-984 5.9 986-989 6.14 996-999 7.8

hex string 4.2 hexadecimal [hex] 1.4 High Power Limit [HIP]

981-984 5.6 986-989 6.11

Hysteresis

Output 1

981-984 [HYS1] 5.6 986-989 [HYS1] 6.11 996-999 [HY1A], [HY1B] 7.5

Output 2

981-984 [HYS2] 5.6 986-989 [HYS2] 6.11 996-999 [HY2A], [HY2B] 7.5

Output 3 [HYS3]

981-984 5.6 986-989 6.11 996-999 7.5

I Idle Set Point [IDSP]

981-984 5.7 986-989 6.11

increment key 2.1 Input 1

Calibration Offset [CAL1]

981-984 5.4 986-989 6.8

996-999 7.3

Decimal Point [DEC1]

981-984 5.5 986-989 6.9 996-999 7.4

Event Function [EI1]

981-984 5.5 986-989 6.10 996-999 7.4

Event Status [EI1S]

981-984 5.5 986-989 6.10 996-999 7.4

Hardware Type [ITY1]

981-984 5.7 986-989 6.12 996-999 7.7

Range High [RH1]

981-984 5.10 986-989 6.15 996-999 7.9

Range Low [RL1]

981-984 5.10 986-989 6.16 996-999 7.9

RTD Calibration [RTD1]

981-984 5.10 986-989 6.16 996-999 7.10

Type [IN1]

981-984 5.7 986-989 6.11 996-999 7.6

Value [C1]

981-984 5.4 986-989 6.8 996-999 7.3

Input 2

Calibration Offset [CAL2]

981-984 5.4 986-989 6.8 996-999 7.3

Decimal Point [DEC2]

986-989 6.9 996-999 7.4

Event Function [EI2]

981-984 5.5 986-989 6.10

Event Status [EI2S]

981-984 5.5 986-989 6.12

Hardware Type [ITY2]

981-984 5.7 986-989 6.13 996-999 7.7

Range High [RH2]

981-984 5.10 986-989 6.15 996-999 7.9

Range Low [RL2]

981-984 5.10 986-989 6.16 996-999 7.9

RTD Calibration [RTD2]

986-989 6.16 996-999 7.10

Type [IN2]

981-984 5.7 986-989 6.12 996-999 7.6

Value [C2]

A.4

Data Communications with the Watlow Series 988 Family Appendix

981-984 5.4 986-989 6.8 996-999 7.3

Input Menu Lockout [INPT]

986-989 6.12 996-999 7.6

Integral

Output 1

981-984 [IT1] 5.7 986-989 [IT1A], [IT1B] 6.12 996-999 [IT1A], [IT1B] 7.7

Output 2

981-984 [IT2] 5.7 986-989 [IT2A], [IT2B] 6.12 996-999 [IT2A], [IT2B] 7.7

interface prompt [IntF] 2.1 interface type [IntF] 3.2

K Keyboard Lockout [LOC]

981-984 5.8 986-989 6.13 996-999 7.7

L leading zeros 4.1

Learn High Slide Wire [LRNH]

981-984 5.8 986-989 6.13

Learn Low Slide Wire [LRNL]

981-984 5.8 986-989 6.13

Linearization Process Input 1 [LIN1]

986-989 6.13

Linearization Process Input 2 [LIN2]

986-989 6.13 996-999 7.7

Local-Remote Set Point [LR]

986-989 6.13

Lockout

Calibration Menu [CAL]

986-989 6.8 996-999 7.3

Channel A PID [PIDA]

996-999 7.9

Channel B PID [PIDB]

996-999 7.9

Comms Menu [COM]

986-989 6.8 996-999 7.3

Diagnostics Menu [DIAG]

986-989 6.9 996-999 7.4

Global Menu [GLBL]

986-989 6.11 996-999 7.5

Input Menu [INPT]

986-989 6.12 996-999 7.6

Output Menu [OTPT]

986-989 6.14 996-999 7.8

PID Set A Menu [PIDA]

986-989 6.14

PID Set B Menu [PIDB]

986-989 6.14

System Menu [SYS]

986-989 6.17 996-999 7.11

Low Power Limit [LOP]

981-984 5.8 986-989 6.13

M master device 1.1

maximum communications

speed 4.3, 4.5 message syntax 4.1 Modbus [MoD] 3.2, 6.1-6.5

address table 6.18

MODE key 2.1 Mode Key Action [MOD]

981-984 5.8 986-989 6.13 996-999 7.7

Model Number [MDL]

981-984 5.8 986-989 6.13

Monitor Command [MTR]

981-984 5.8, 5.12

multidrop

interface 2.1 network 2.1 system 1.3

multiple devices 1.2 N NAK 1.6, A.1

Negative Acknowledge <NAK> 1.6,

A.1-A.2 no parity 1.5 not acknowledged 1.6, A.1

O odd parity 1.5

Output 1

Action

981-984 [OT1] 5.8

986-989 [OT1] 6.13

996-999 [OT1A], [OT1B] 7.7

Derivative PID

981-984 [DE1] 5.4

986-989 [DE1A], [DE1B] 6.9

996-999 [DE1A], [DE1B] 7.4

Hardware Type [OTY1]

981-984 5.9

986-989 6.14

996-999 7.8

Hysteresis

981-984 [HYS1] 5.6

986-989 [HYS1] 6.11

996-999 [HY1A], [HY1B] 7.5

Integral

981-984 [IT1] 5.7

986-989 [IT1A], [IT1B] 6.12

996-999 [IT1A], [IT1B] 7.7

Process Range [PRC1]

981-984 5.9

986-989 6.15

Proportional Band

981-984 [PB1] 5.9

986-989 [PB1A], [PB1B] 6.14

996-999 [PB1A], [PB1B] 7.8

Rate

981-984 [RA1] 5.10

986-989 [RA1A], [RA1B] 6.15

996-999 [RA1A], [RA1B] 7.9

Reset [RE1]

981-984 5.10

Index

Reset PID [RE1A], [RE1B]

986-989 6.15 996-999 7.9

Output 2

Action

981-984 [OT2] 5.8 986-989 [OT2] 6.13 996-999 [OT2A], [OT2B] 7.7

Alarm High [A2HI]

981-984 5.3 986-989 6.7

Alarm Low [A2LO]

981-984 5.3 986-989 6.7

Derivative PID

981-984 [DE2] 5.4 986-989 [DE2A], [DE2B] 6.9 996-999 [DE2A], [DE2B] 7.4

Hardware Type [OTY2]

981-984 5.9 986-989 6.14 996-999 7.8

Hysteresis

981-984 [HYS2] 5.6 986-989 [HYS2] 6.11 996-999 [HY2A], [HY2B] 7.5

Integral

981-984 [IT2] 5.7 986-989 [IT2A], [IT2B] 6.12 996-999 [IT2A], [IT2B] 7.7

Process Range [PRC2]

981-984 5.9 986-989 6.15

Proportional Band

981-984 [PB2] 5.9 986-989 [PB2A], [PB2B] 6.14 996-999 [PB2A], [PB2B] 7.8

Rate

981-984 [RA2] 5.10 986-989 [RA2A], [RA2B] 6.15 996-999 [RA2A], [RA2B] 7.9

Reset [RE2]

981-984 5.10

Reset PID {RE2A], RE2B]

986-989 6.15 996-999 7.9

Output 3

Action [OT3]

981-984 5.8 986-989 6.14 996-999 7.8

Alarm High [A3HI]

981-984 5.3 986-989 6.7 996-999 7.2

Alarm Low [A3LO]

981-984 5.3 986-989 6.7 996-999 7.2

Analog Retransmit [AOUT]

981-984 5.4 986-989 6.8 996-999 7.2

Appendix

Data Communications with the Watlow Series 988 Family

A.5

Index

Hardware Type [OTY3]

981-984 5.9 986-989 6.14 996-999 7.8

Hysteresis [HYS3]

981-984 5.6 986-989 6.11 996-999 7.5

Process Range [PRC3]

981-984 5.9 986-989 6.15 996-999 7.9

Status [OT3S]

996-999 7.8

Output 4

Hardware Type [OTY4]

981-984 5.9 986-989 6.14 996-999 7.8

Output Menu Lockout [OTPT]

986-989 6.14 996-999 7.8

Output Process Range

Channel A [PRCA]

996-999 7.9

Channel B [PRCB]

996-999 7.9

Output State

Event 3 981-984 [ENT3] 5.5 Event 4 981-984 [ENT4] 5.5

Outputs, Test [TOUT]

981-984 5.11 986-989 6.17 996-999 7.11

P parity 3.2

parity bit 1.4 Percent Power Output [PWR]

981-984 5.10 986-989 6.15

PID Set A Menu Lockout [PIDA]

986-989 6.14

PID Set B Menu Lockout [PIDB]

986-989 6.14

PID Set Crossover [PID2]

986-989 6.15

Power Outage Response [POUT]

981-984 5.9

Process Deviation Display [DEV]

981-984 5.5 986-989 6.9

Process Range

Output [PRCA], [PRCB]

996-999 7.9

Output 1 [PRC1]

981-984 5.9 986-989 6.15

Output 2 [PRC2]

981-984 5.9 986-989 6.15

Output 3 [PRC3]

981-984 5.9 986-989 6.15 996-999 7.9

Process Value for PID Switch [PROC]

986-989 6.15

Program a File Step [STP]

981-984 5.11

Program Start Point [PSTR]

981-984 5.9

Program Type [PTYP]

981-984 5.9

Prompts, COM Menu 3.2 Proportional Band

Output 1

981-984 [PB1] 5.9 986-989 [PB1A], [PB1B] 6.14 996-999 [PB1A], [PB1B] 7.8

Output 2

981-984 [PB2] 5.9 986-989 [PB2A], [PB2B] 6.14 996-999 [PB2A], [PB2B] 7.8

Protocol 1.1

prompt [Prot] 3.1-3.2 XON/XOFF RS-232 4.2

pull-down resistors 2.3 Q Query Any Step

Program [STP] 5.13

Quick BASIC 1.5 R Ramp Rate

986-989 [RATE] 6.16 996-999 [RTA], [RTB] 7.10

Ramping Initiation

986-989 [RP] 6.16 996-999 [RPA], [RPB] 7.10

Range High

Input 1 [RH1]

981-984 5.10 986-989 6.15 996-999 7.9

Input 2 [RH2]

981-984 5.10 986-989 6.15 996-999 7.9

Retransmit [ARH]

981-984 5.4 986-989 6.8 996-999 7.2

Range Low

Input 1 [RL1]

981-984 5.10 986-989 6.16 996-999 7.9

Input 2 [RL2]

981-984 5.10 986-989 6.16 996-999 7.9

Retransmit [ARL]

981-984 5.4 986-989 6.8 996-999 7.2

Rate

Output 1

981-984 [RA1] 5.10 986-989 [RA1A], [RA1B] 6.15 996-999 [RA1A], [RA1B] 7.9

Output 2

981-984 [RA2] 5.10 986-989 [RA2A], [RA2B] 6.15

996-999 [RA2A], [RA2B] 7.9

remote device 1.1 Remote Set Point [RSP]

986-989 6.16

Reset

Output 1 [RE1]

981-984 5.10

Output 1 PID [RE1A], [RE1B]

986-989 6.15 996-999 7.9

Output 2 [RE2]

981-984 5.10

Output 2 PID {RE2A], RE2B]

986-989 6.15 996-999 7.9

Resume a Program [RESU]

981-984 5.10

Retransmit

Range High [ARH]

981-984 5.4 986-989 6.8 996-999 7.2

Range Low [ARL]

981-984 5.4 986-989 6.8 996-999 7.2

RTD Calibration

Input 1 [RTD1]

981-984 5.10 986-989 6.16 996-999 7.10

Input 2 [RTD2]

986-989 6.16 996-999 7.10

rules, data 4.1 run/hold mode

981-984 5.2

Run/Hold Status [RHS]

981-984 5.10

S Sensor Failure Output [FAIL]

986-989 6.10 996-999 7.5

serial interface 2.1 Serial Number [SRNB], [SRNT]

981-984 5.10 986-989 6.16 996-999 7.10

Set Point 1 [SP1]

986-989 6.16

Set Point 2

986-989 [SP2] 6.16 996-999 [SP2A], [SP2B] 7.10

Set Point 2 Type [SP2C]

986-989 6.17

Set Point Channel A [SPA]

996-999 7.10

Set Point Channel B [SPB]

996-999 7.10

Set Point Value PID Switch [STPT]

986-989 6.17

Setup Menu [`SEt] 2.1, 3.2, 4.4 Simulate HOLD Key [HOLD]

981-984 5.6

Slidewire Dead Band % [HUNT]

981-984 5.6 986-989 6.11

A.6

Data Communications with the Watlow Series 988 Family Appendix

Slidewire Hysteresis [SHYS] 6.16 Software Revision [SOFT]

981-984 5.10 986-989 6.16 996-999 7.10

SP1 1.6-1.7 space <sp> 4.2 Start a File [STRT]

981-984 5.11

start bit 1.5 Start of Text <STX> 1.6-1.7 Status

Output 3 [OT3S]

996-999 7.8

Step Command [STP]

981-984 5.13

stop bit 1.5 STX 1.6-17, 4.2 syntax 1.5, 4.1 Syntax Query [MTR] 5.12 System Menu Lockout [SYS]

986-989 6.17 996-999 7.11

T termination resistors 2.3, 2.4

Test Outputs [TOUT]

981-984 5.11 986-989 6.17 996-999 7.11

total characters 4.1 Type

Input 1 [IN1]

981-984 5.7 986-989 6.11 996-999 7.6

Input 2 [IN2]

981-984 5.7 986-989 6.12 996-999 7.6

U user responsibility A.1 V Value [C1]

Input 1 [C1]

981-984 5.4 986-989 6.8 996-999 7.3

Input 2 [C2]

981-984 5.4 986-989 6.8 996-999 7.3

W waitfor event 5.5

wiring 2.1 X XOFF character 4.2

XON character 4.2 XON/XOFF protocol 3.1-3.2, 4.2-4.3,

A.1

Index

Appendix

Data Communications with the Watlow Series 988 Family

A.7

Appendix

Introduc-

tion

Notes

A.8

Data Communications with the Watlow Series 988 Family Appendix

Notes

Appendix

Data Communications with the Watlow Series 988 Family

A.9

Appendix

Notes

A.10

Data Communications with the Watlow Series 988 Family Appendix

Notes

Series 981-984, 986-989 and 996-999 Data Communications User's Manual

Watlow Controls, 1241 Bundy Blvd., P.O. Box 5580, Winona, MN 55987-5580; Phone: (507) 454-5300; Fax: (507) 452-4507

Watlow 988 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of Contents

Chapter 1 Introduction to Data Communications

Interfaces

ASCII

Syntax

Chapter 2 Hardware and Wiring

Wiring

Chapter 3 Communications Setup

Setup

Chapter 4 Sending Commands

XON/XOFF

ANSI X3.28

Modbus RTU

Commands

Chapter 5 Command Summary of the Series 981-984

Ramping Controller Prompt Table

Ramping Controller MTR Command

Ramping Controller STP Command

Ramping Controller Commands

Chapter 6 Command Summary of the Series 986-989

Temperature/process Controller Prompt Table

Chapter 7 Command Summary of the Series 996-999

Dual Channel Controller Prompt Table

Appendix

Errors

ASCII

Index