Red Lion PAXCDC5 User Manual

MICRO

DP

DATA

WD

PROFIBUS-DP

CONNECTOR

CONTROLLER

DIAGNOSTIC

LEDs

R0TARY

SWITCHES

(ON BACK)

Tel [phone]

100

10

1

R0TARY

SWITCHES

Fax [phone]
www.redlion.net

MODEL PAXCDC - PROFIBUS-DP COMMUNICATIONS OPTION CARD

 CONNECTS PAX METER TO PROFIBUS-DP NETWORK
 STANDARD 9-PIN D-SUB CONNECTOR INTERFACE
 CYCLIC I/O DATA TRANSMISSION, UP TO 84 BYTES IN/OUT
 OPERATING RANGE FROM 9.6 KBAUD TO 12 MBAUD WITH

AUTOMATIC BAUD RATE DETECTION

 STATION ADDRESS SET THROUGH ROTARY SWITCHES
 CONFIGURATION VIA SELECTION OF PRE-CONFIGURED

MODULES FOR THE SPECIFIC PAX METER TYPE

 FREEZE MODE AND SYNC MODE SUPPORTED
 DIAGNOSTIC LEDs INDICATE CARD STATUS
 PNO CERTIFIED, CONFORMANCE TESTED SLAVE DEVICE

Bulletin No. PAXCDC5-D
Drawing No. LP0549
Released 01/11

DESCRIPTION

connection for a PAX panel meter to a PROFIBUS-DP Network. This allows a
PROFIBUS Master device, such as a PLC, to control and monitor the operation
of the PAX meter. The meter functions as an intelligent PROFIBUS-DP Slave
device on the Network.

female connector on the rear of the card. The card is installed in the PAX meter
using a slotted rear cover, allowing the PROFIBUS-DP Connector to extend
beyond the rear of the PAX case. Power for the card is provided internally from
the power supply of the PAX meter. The PROFIBUS-DP Network is isolated
from the control electronics on the card using high-speed optocouplers.

Detection, with an operating range of 9.6 Kbaud up to 12 Mbaud. The Station
Address is set via rotary switches. The card’s address is read at power up.

The PAX PROFIBUS-DP Communications Option Card provides a direct

The PROFIBUS-DP Network connects through a 9-pin D-subminiature

This fully featured communications card supports Automatic Baud Rate

Data Exchange with the Master device occurs through cyclic I/O data
transmission. The size of the I/O data block is determined by the selection of
pre-configured Modules for the specific PAX meter type. All data values are in
32-bit integer format, Motorola byte ordering. The PROFIBUS-DP protocol per
EN 50170 is implemented using the Siemens SPC3 ASIC. Three on-board
Diagnostic LEDs indicate the status of Data Exchange (DATA), the SPC3
Watchdog (WD) and DP State Machine (DP).

PNO Conformance and GSD File

The PAX PROFIBUS-DP Card is PNO certified, having passed the
conformance test for PROFIBUS-DP Slave devices, Certificate No. Z01170.
The PNO Identifier for this PROFIBUS device is 0x09D0. The functional
characteristics are described in GSD file REDL09D0.GSD. The GSD file and
PAX bitmap can be downloaded from the Red Lion Controls website.

SPECIFICATIONS

1. FIELDBUS TYPE: PROFIBUS-DP per standard EN 50170, implemented

with Siemens SPC3 ASIC

2. BUS INTERFACE: Isolated RS485 through 9-Pin D-Sub connector

3. NETWORK ISOLA TION: 500 Vrms for 1 minute (50 V working) between

PROFIBUS-DP network and PAX Sensor & User Input commons. Not

isolated from other PAX option card commons.

4. POWER: Card powered internally by the PAX meter

5. OUTPUT POWER: +5 VDC @ 90 mA max. available on the D-Sub

connector pins 5 (GND) and 6 (+5 V)

6. BAUD RATES: 9.6 Kbaud to 12 Mbaud, Auto Baud Rate Detection

7. STATION ADDRESS: 0 to 125, set by rotary switches

8. SUPPORTED FUNCTIONS:

FREEZE Mode: Supported

SYNC Mode: Supported

FAIL SAFE Mode: Not Supported

EXTERNAL DIAGNOSTIC DATA: Not Supported

9. INSTALLATION REQUIREMENTS:

Installed Depth: 4.88" (124 mm) from the rear of the PAX bezel

Additional Height: 0.35" (9 mm) above the PAX case surface

ORDERING INFORMATION

MODEL NO. DESCRIPTION PART NUMBER

PAX PROFIBUS-DP Communications Card

1

PAXCDC50PAXCDC

INSTALLING AN OPTION CARD

Finger
Hold

Finger

Hold

Serial

Communications

Card

Setpoint
Output
Card

Alignment

Slots

Connectors

Main
Circuit
Board

Analog Output

or

Real-Time

Clock Card

Caution: The option and main circuit cards contain static
sensitive components. Before handling the cards, dischar ge static
charges from your body by touching a grounded bare metal
object. Ideally, handle the cards at a static controlled clean
workstation. Also, only handle the cards by the edges. Dirt, oil or
other contaminants that may contact the cards can adversely
affect circuit operation.

Warning: Exposed line voltage exists on the circuit boards.
Remove all power to the meter AND load circuits before
accessing the unit.

1. Remove the main assembly from the rear of the case. Squeeze the finger
holds on the rear cover, or use a small screwdriver to depress the side
latches to release it from the case. It is not necessary to separate the rear
cover from the main circuit card.

2. Locate the option card connector for the serial communication card.
Hold the unit by the rear cover, not the display board, when installing an
option card.

3. Install the option card by aligning the option card with the slot in the rear
cover. Be sure the connector is fully engaged and the tab on the option
card rests in the alignment slot on the display board.

4. Slide the assembly back into the case. Be sure the rear cover latches fully
into the case.

TOP VIEW

PRINCIPLE OF OPERATION

The PAX PROFIBUS-DP Card provides the PROFIBUS Network with
access to an Input Data Block (data written to the PROFIBUS Network from the
PAX) and an Output Data Block (data read from the PROFIBUS Network by
the PAX). Using an internal high speed protocol, the card scans each PAX
register in turn, continuously reading Input Data and only writing Output Data
on demand. The PAX registers are mapped into each Input and Output Data
Block, allowing the PROFIBUS Network read/write access to all the registers
in the PAX. The structure of these Data Blocks is described in more detail in
section Data Block Structure.

The Input Data and Output Data Blocks are updated at the end of each scan
of the host PAX Meter. In order to increase the rate that new data is made
available to the PROFIBUS Network, a scheme is employed that reduces the
number of registers polled by the card in each scan to only those that are
required in the application. This Polled Read Mask maps each bit to a PAX
register index which, when set, will force that register to be read from the PAX
Meter. This Polled Read Mask is defined as User Parameter Data and is
described in more detail in section Parameterization.

Due to the cyclic nature of data exchange in the PROFIBUS network
changing Output Data in a slave device, a scheme is employed that indicates
which registers need to be written to the PAX Meter. This Demand Write Mask
maps each bit to a register index which when set, will perform a “once only”
write from the Output Data Block to the PAX Meter. Clearing and re-setting the
bit in the Demand Write Mask will cause the value to be written again. The
Demand Write Mask is part of the Data Block structure and is described in detail
in section Demand Write and Store Request Masks.

STATION ADDRESS

The station address is set using three rotary switches allowing the ID to be set
in standard decimal notation (e.g. address = 123 - SWC = 1, SWB = 2, SWA =

3). Valid addresses range from 0 to 125. If an address greater than 125 is set, the
card will default to a station address of 125.

DIAGNOSTIC LEDs

Three LEDs indicate the status of the SPC3 DP Control State Machine (DP),
the Watchdog State Machine (WD) and the PROFIBUS-DP Data Exchange
State (DAT A) as shown in Table 1. The LEDs are viewable through the vents on
the top of the PAX case.

Table 1 - LED Indication of PROFIBUS-DP Card Status

LED STATE

DP (Red) WD (Green) DATA (Red)

FLASHING FLASHING OFF Bus Not Connected

OFF FLASHING OFF Baud Rate Search
OFF ON OFF Baud Control

FLASHING ON OFF Waiting for Parameterization

ON ON OFF Waiting for Configuration

OFF OFF ON Data Exchange

CARD STATUS

Note: The card will not default to 125 if set for 999, this number is a special

test mode.

2

PARAMETERIZATION

The Polled Read Mask defines which P AX registers will be polled by the card
and therefore updated in the Input Data Block. The Polled Read Mask is a 32-bit
integer with each bit mapped to a PAX register index. The Polled Read Mask is
configured in the card by the Master sending a Parameterization telegram with
4 bytes of User Parameter Data representing the Polled Read Mask, in Motorola
byte ordering.

Table 2 shows the User Parameter bytes representing the Polled Read Mask
and gives the default value and a typical example. The default Polled Read
Mask indicates PAX register index 0 will be updated in the Input Block. The
example Polled Read Mask indicates that PAX registers 0 and 8 will be updated
in the Input Block.

Table 2 - User Parameter Data

BYTE 0 1 2 3 4

DESCRIPTION

DEFAULT

EXAMPLE

- Polled Read Mask
0x00 0x00 0x00 0x00 0x01
0x00 0x00 0x00 0x01 0x01

CONFIGURATION

Configuration of the Data Block is by the selection of pre-configured
modules, identified in the GSD file as “P AX Digital (6-digit)” and “PAX Analog
(5-digit)”. They differ in the number of registers available and therefore the size
of the Data Block required to map all the registers completely. Each PAX
register is represented as a 32-bit Integer requiring 2, 16-bit words or 4 bytes.

DATA EXCHANGE

Demand Write and Store Request Masks

The Demand Write Mask defines how data is written to the PAX. The
Demand Write Mask is a 32-bit integer with each bit mapped to a PAX register
index. Setting a bit in the Demand Write Mask of the Output Data Block will
force the corresponding register to be written “once only” to the PAX. Clearing
and re-setting the bit will cause the value to be written again. The Demand Write
Mask is part of the Data Block structure.

The Write Service Status register in the Input Data Block reports when the
register has been written to the PAX by setting the corresponding bit. By
monitoring this register a PLC program can detect when the Output Data has
been serviced. The bit will be cleared in the Service Status register when the
corresponding bit is cleared in the Demand Write Mask.

The Store Mask defines how the written value is to be stored in the P AX. The
PAX meters have some values stored in EEPROM so they may power up in the
last saved state. For values that change often it is possible to exceed the life of
an EEPROM with repeated writes to the same address location - this method
inhibits writes to EEPROM. The Store Mask is a 32-bit integer with each bit
mapped to a PAX register index. Setting a bit will inhibit the corresponding
register from being saved to EEPROM.

Data Block Structure

Table 3 shows the Data Block Structure, consisting of the Write and Store
Masks and the individual PAX Data Registers. Each Data Register value is a
32-bit Integer, with Motorola byte ordering. For the Analog PAX meters, the
Data Block size is 48 bytes Input, 48 bytes Output. For the PAXDP and PAX2A
Analog meters, and the Digital PAX meters, the Data Block size is 84 bytes
Input, 84 bytes Output.

Table 3 - Data Block Structure

REGISTER INDEX

(Mask Bit)

- 1 - 4 Demand Write Mask (Output) / Service Status (Input)

- 5 - 8 Store Mask (Output) / Unused (Input)
0 9 - 12 Input * Input A (relative) * Input (relative) * Count A Rate A * Timer
1 13 - 16 Total * Input B (relative) * Total * Count B Rate B * Counter
2 17 - 20 Max. Input * Calculation * Max. Input * Count C Rate C * RTC Time
3 21 - 24 Min. Input * Total * Min. Input * Rate Total A RTC Date
4 25 - 28 Setpoint 1 Min Input * Setpoint 1 Min. Rate Total B Setpoint 1
5 29 - 32 Setpoint 2 Max Input * Setpoint 2 Max. Rate Total C * Setpoint 2
6 33 - 36 Setpoint 3 Input A (absolute) * Setpoint 3 Scale Factor A Scale Factor A Setpoint 3
7 37 - 40 Setpoint 4 Input B (absolute) * Setpoint 4 Scale Factor B Scale Factor B Setpoint 4
8 41 - 44 AOR ** Input A (offset) Band/Deviation 1 Scale Factor C Scale Factor C Setpoint Off 1
9 45 - 48 CSR ** Input B (offset) Band/Deviation 2 Count Load A Count Load A Setpoint Off 2

10 49 - 52 ---- *** Band/Deviation 3 Count Load B Count Load B Setpoint Off 3
11 53 - 56 ---- *** Band/Deviation 4 Count Load C *** Setpoint Off 4
12 57 - 60 ---- Setpoint 1 Input (absolute) * Setpoint 1 Setpoint 1 Timer Start
13 61 - 64 ---- Setpoint 2 Input Offset Setpoint 2 Setpoint 2 Counter Start
14 65 - 68 ---- Setpoint 3 *** Setpoint 3 Setpoint 3 Timer Stop
15 69 - 72 ---- Setpoint 4 *** Setpoint 4 Setpoint 4 Counter Stop
16 73 - 76 ---- MMR ** MMR ** MMR ** MMR ** MMR **
17 77 - 80 ---- AOR ** AOR ** AOR ** AOR ** RTC Day
18 81 - 84 ---- SOR ** SOR ** SOR ** SOR ** SOR **

DATA BLOCK

BYTES

PAX ANALOG

INPUT METER

(5-Digit)

PAXDP ANALOG

INPUT METER

(5-Digit) ****

PAX2A ANALOG

INPUT METER

(6-Digit) ****

PAXI DIGITAL

COUNT / RATE

(6-Digit)

PAXDR DIGITAL

DUAL RATE

(6-Digit)

PAXCK DIGITAL
CLOCK / TIMER

(6-Digit)

* Indicates Read-Only parameters. All other parameters are Read/Write.

** Indicates PAX Manual Mode Registers. See next section for description.

*** Indicates bit value must not be set in the Parameterization polled read mask.

**** Select “PAX Digital (6-digit)” module for full mapping of the available registers.

3

PAX MANUAL MODE REGISTERS

CSR - Control Status Register (PAX Analog Only)

The Control Status Register is used to directly control the meter’s outputs
(setpoints and analog output), or view the state of the setpoint outputs and the
status of the temperature sensor (PAXT only). The CSR register is bit mapped,
with the bit positions of the least-significant byte assigned to specific control
functions. The control functions are invoked by writing to the appropriate bit
position. The bit position definitions are:



bit 1: Setpoint 2 Output
bit 2: Setpoint 3 Output
bit 3: Setpoint 4 Output

0 = output off
1 = output on




bit 4: Auto/Manual Mode

0 = automatic mode
1 = manual mode

Setting bit 4 of the CSR selects Manual Mode. In this mode, the setpoint
outputs are defined by the values written to bits b0, b1, b2, b3; and the analog
output is defined by the value written to the Analog Output Register (AOR).
Internal control of these outputs is then overridden.

In Automatic Mode, the setpoint outputs can only be Reset off. The contents
of the CSR may be read to interrogate the state of the setpoint outputs and to
check the status of the temperature sensor (PAXT only).

bit 5: Unused (always stays 0)bit 0: Setpoint 1 Output

bit 6: Sensor Status (PAXT only)

0 = sensor normal
1 = sensor fail

bit 7: Unused (always stays 0)

(AOR) Analog Output Register (Not applicable to PAXCK)

The Analog Output Register value defines the signal level of the meter’s
analog output. The range of values for this register is 0 to 4095 (0FFFh), which
corresponds to the analog output signal ranges shown in Table 4.

Table 4 - Analog Output Signal Ranges

Register

Value

0

1
2047
4094
4095

In Automatic mode, the meter controls the analog output signal level.
Reading the AOR will show the present value of the analog output signal. While
in Automatic mode, this register may be written to, but it has no effect until the
analog output is placed in the Manual mode.

In Manual mode, writing to the AOR causes the analog output signal level to
update per the value written. Manual mode is engaged by setting bit 4 of the
CSR (PAX Analog meter) or bit 0 of the MMR (PAXDP/PAX2A/PAXI/
P AXDR). If a value lar ger than 4095 is written to the AOR, 4095 will be loaded.

Output Signal*

0-20 mA

20.000 20.000 10.000

4-20 mA

4.000 0.0000.000

0.005 4.004 0.0025

12.000 5.00010.000

19.996 9.997519.995

0-10 V

*Due to the absolute accuracy
rating and resolution of the
output card, the actual output
signal may differ 0.15% FS from
the table values. The output
signal corresponds to the range
selected (0-20 mA or 0-10 V).

MMR - Auto/Manual Mode Register
(PAXDP/PAX2A/PAXI/PAXDR/PAXCK)

This register sets the controlling mode for each output in the PAX meters.
Each output may be independently changed to Auto or Manual mode. The MMR
register is bit mapped, with the bit positions of the least-significant byte
assigned to specific outputs. Auto or Manual mode is selected by writing to the
appropriate bit position. The bit position definitions are:

PAXDP/PAX2A/PAXI/PAXDR PAXCK

bit 0: Analog Output bit 0: Setpoint 4 Output
bit 1: Setpoint 4 Output bit 1: Setpoint 3 Output
bit 2: Setpoint 3 Output bit 2: Setpoint 2 Output
bit 3: Setpoint 2 Output bit 3: Setpoint 1 Output
bit 4: Setpoint 1 Output

0 = Auto Mode, 1 = Manual Mode

In Auto Mode (0) the meter controls the setpoint output state and the Analog
Output (PAXDP/PAX2A/PAXI/PAXDR only). In Manual Mode (1) the setpoint
outputs are defined by the value in the Setpoint Output Register (SOR); and the
Analog Output is defined by the value written to the Analog Output Register
(AOR). When transferring from Auto Mode to Manual Mode, the meter holds
the last output value (until the register is changed by a write).

SOR - Setpoint Output Register
(PAXDP/PAX2A/PAXI/PAXDR/PAXCK)

The Setpoint Output Register is used to view or change the states of the
setpoint outputs in the PAX meters. Reading this register will show the present
state of all the setpoint outputs. A “0” means the output is inactive and a “1”
means the output is active.

In Auto Mode (see MMR description), the meter controls the setpoint output
state. In Manual Mode, the four least-significant bits of the SOR are assigned to
specific outputs. Writing to the appropriate bit position defines the state of the
setpoint output. The bit position definitions are:

bit 0: Setpoint 4 Output Status
bit 1: Setpoint 3 Output Status 0 = Output Off

bit 2: Setpoint 2 Output Status 1 = Output On
bit 3: Setpoint 1 Output Status





INSTALLATION AND CONNECTION

Installation Clearance Required - In Inches (mm)

.35 (9)

4.88 (124)

PROFIBUS-DP Network Connection

PROFIBUS plug connectors such as Siemens 6ES7 972-0BA10-0XA0 are
recommended. When wiring the connector, be sure to observe the proper
direction for data flows, indicated by the arrows on the connector. When the
PAX meter is the last device on the network, set the terminating resistor switch
on the connector to the “ON” position.

1

to downstream

PROFIBUS Network

5

2

6

3

7

8

9

4

10

to upstream

PROFIBUS Network

Red Lion Controls
Headquarters
20 Willow Springs Circle
York PA 17406
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Europe

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China

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