The information in this manual is subject to change without notice.
Throughout this manual, the following notes are used to alert you to safety considerations:
ATTENTION:Identifies information about practices or circumstances that can lead to personal
injury or death, property damage, or economic loss.
!
Important: Identifies information that is critical for successful application and understanding of the product.
ATTENTION:Only qualified electrical personnel familiar with the construction and operation of
this equipment and the hazards involved should install, adjust, operate, or service this equipment.
!
Read and understand this manual and other applicable manuals in their entirety before
proceeding. Failure to observe this precaution could result in severe bodily injury or loss of life.
ATTENTION:DC bus capacitors retain hazardous voltages after input power has been
disconnected. After disconnecting input power, wait five (5) minutes for the DC bus capacitors to
discharge and then check the voltage with a voltmeter to ensure the DC bus capacitors are
discharged before touching any internal components. Failure to observe this precaution could
result in severe bodily injury or loss of life.
ATTENTION:The drive can operate at and maintain zero speed. The user is responsible for
assuring safe conditions for operating personnel by providing suitable guards, audible or visual
alarms, or other devices to indicate that the drive is operating or may operate at or near zero
speed. Failure to observe this precaution could result in severe bodily injury or loss of life.
ATTENTION:Do not install modification kits with power applied to the drive. Disconnect and lock
out incoming power before attempting such installation or removal. Failure to observe this
precaution could result in severe bodily injury or loss of life.
ATTENTION:The drive start/stop/enable control circuitry includes solid state components. If
hazards due to accidental contact with moving machinery or unintentional flow of liquid, gas or
solids exist, an additional hardwired stop circuit may be required to remove the AC line to the
drive. An auxiliary braking method may be required.
ATTENTION:The drive contains ESD- (Electrostatic Discharge) sensitive parts and assemblies.
Static control precautions are required when installing, testing, servicing, or repairing the drive.
Erratic machine operation and damage to, or destruction of, equipment can result if this procedure
is not followed. Failure to observe this precaution can result in bodily injury.
ATTENTION:The user is responsible for conforming with all applicable local, national, and
international codes. Failure to observe this precaution could result in damage to, or destruction
of, the equipment.
Madein the U.S.A. by Rockwell Automation Co. (FAC1C)
I/O:
Frame: 1
DBT
CNMD180W0ENNNC1
CNMD180W0ENNNC1
The purpose of this manual is to provide you with the basic information needed to
install, start-up, and troubleshoot the Reach Drive.
1.1Who Should Use this Manual?
This manual is intended for qualified personnel. You must be able to program and
operate adjustable frequency AC drives devices. In addition, you must have an
understanding of the parameter settings and functions.
1.2Manual Conventions
Parameter names: In most instances, parameter names are shown as the parameter
name followed by the parameter number.
For example: Ramped Speed (22).
1.3Identifying the Drive by Nameplate
Introduction
Introduction
Each Reach Drive can be identified by its nameplate.
Figure 1.1 – Identifying the Drive by Nameplate
1-1
1.4Identifying the Drive by Model Number
Each Reach Drive and Reach Drive Kit can be identified by its model number. The
model number is on the shipping label and drive nameplate. The model number
includes the drive and any factory-installed options.
Table 1.1 – Reach Drive Model Numbers
PartModel Number
Reach DriveCNMD180W0ENNNC1
ControNet Comm
Adapter Fiber Kit
Pump Control
Adapter Kit
Dynamic Brake
Resistor Kit
CNM-CNETGF-11
CNM-PCTRL-11
CNM-R2-019P600
1-2
DBT Reach Drive User Manual
Installation/Wiring
This chapter provides information on mounting and wiring the Reach Drive.
Most start-up difficulties are the result of incorrect wiring. Every precaution must be
taken to assure that the wiring is done as instructed. All items must be read and
understood before the actual installation begins
ATTENTION:The following information is merely a guide for proper
installation. Rockwell Automation cannot assume responsibility for the
!
2.1AC Supply Source Considerations
Reach Drives are suitable for use on a circuit capable of delivering up to a maximum
of 200,000 rms symmetrical amperes and a maximum of 600 volts.
compliance or the noncompliance to any code, national, local or
otherwise for the proper installation of this drive or associated equipment.
A hazard of personal injury and/or equipment damage exists if codes are
ignored during installation.
CHAPTER 2
ATTENTION:To guard against personal injury and/or equipment
damage caused by improper fusing or circuit breaker selection, use only
!
If a system ground fault monitor (RCD) is to be used, only Type B (adjustable) devices
should be used to avoid nuisance tripping.
the recommended line fuses/circuit breakers specified in Appendix A.
Installation/Wiring
2-1
2.1.1 Unbalanced or Ungrounded Distribution Systems
ATTENTION:Power distribution to Reach Drives is intended to be from
the ungrounded secondary of the system’s step down transformer.
!
Protective MOVs, the EMI Snubber Board, and common mode capacitors
(3 places) in the drive have been disconnected. They should typically be
reconnected in any application where the power distribution at the drive
is grounded. Refer to Figure 2.1
REMOVE SCREW
FASTEN LUGS WITH SCREW TO FLANGE
TIGHTEN SCREW TO 28 in-lbs
TUCK LEADS BACK INTO UNIT
Figure 2.1 – Protective Circuit Connections for Grounded Drive Systems
2.1.2 Input Power Conditioning
Certain events on the power system supplying a drive can cause component damage
or shortened product life. The following events can cause such damage.
• The power system has power factor correction capacitors switched in and out of
the system, either by the user or by the power company.
• The power source has intermittent voltage spikes in excess of 6000 volts. These
spikes could be caused by other equipment on the line or by events such as
lightning strikes.
DBT Reach Drive User Manual
• The power source has frequent interruptions.
GROUNDPOINT
GROUNDPOINT
GROUNDPOINT
If these conditions exist, it is recommended that the user install a minimum amount of
impedance between the drive and the source. This impedance could come from the
supply transformer itself, the cable between the transformer and drive or an additional
transformer or reactor.
2.2General Grounding Requirements
The drive Safety Ground - PE must be connected to system ground. Ground
impedance must conform to the requirements of national and local industrial safety
regulations and/or electrical codes. The integrity of all ground connections should be
periodically checked.
For installations within a cabinet, a single safety ground point or ground bus bar
connected directly to building steel should be used. All circuits including the AC input
ground conductor should be grounded independently and directly to this point/bar.
Refer to Figure 2.2 and Table 2.1.
Installation/Wiring
Figure 2.2 – Recommended Ground Locations
2-3
Table 2.1 – Power Termination Locations Notes
TerminalDescriptionNotes
BR1DC Brake (+)DB Resistor Connection
BR2DC Brake (-)
DC+DC Bus (+)
DC-DC Bus (-)
PEPE Ground
Motor Ground
UU (T1)To motor
VV (T2)To motor
WW (T3)To motor
RR (L1)AC Line Input Power
SS (L2)AC Line Input Power
TT (L3)AC Line Input Power
PS+AUX (+)Auxiliary Control Voltage
PS-AUX (-)Auxiliary Control Voltage
2.2.1 Safety Ground - PE
This is the safety ground for the drive that is required by code. This point must be
connected to adjacent building steel (girder, joist), a floor ground rod or bus bar (see
above). Grounding points must comply with national and local industrial safety
regulations and/or electrical codes.
2.2.2 Shield Termination - SHLD
The Shield terminal provides a grounding point for the motor cable shield. The motor
cable shield should be connected to this terminal on the drive (drive end) and the
motor frame (motor end). A shield terminating cable gland may also be used.
When shielded cable is used for control and signal wiring, the shield should be
grounded at the source end only, not at the drive end.
2-4
DBT Reach Drive User Manual
2.2.3 RFI Filter Grounding
Using an optional RFI filter may result in relatively high ground leakage currents.
Therefore, the filter must only be used in installations with grounded AC supply systems and be permanently installed and solidly grounded (bonded) to the
building power distribution ground. Ensure that the incoming supply neutral is solidly
connected (bonded) to the same building power distribution ground. Grounding must
not rely on flexible cables and should not include any form of plug or socket that would
permit inadvertent disconnection. Some local codes may require redundant ground
connections. The integrity of all connections should be periodically checked. Refer to
the instructions supplied with the filter.
2.3Fuses and Circuit Breakers
The Reach Drive includes input fuses. National and local industrial safety regulations
and/or electrical codes may determine additional requirements for these installations.
Refer to Appendix A for recommended fuses/circuit breakers.
ATTENTION:The Reach Drive does not provide branch short circuit
protection. Specifications for the recommended fuse or circuit breaker to
!
provide protection against short circuits are provided in Appendix A.
2.4Power Wiring
ATTENTION:National Codes and standards (NEC, VDE, BSI etc.) and
local codes outline provisions for safely installing electrical equipment.
!
Installation must comply with specifications regarding wire types,
conductor sizes, branch circuit protection and disconnect devices. Failure
to do so may result in personal injury and/or equipment damage.
2.4.1 Cable Types Acceptable for 200-600 Volt Installations
A variety of cable types are acceptable for drive installations. For many installations,
unshielded cable is adequate, provided it can be separated from sensitive circuits. As
an approximate guide, allow a spacing of 0.3 meters (1 foot) for every 10 meters (32.8
feet) of length. In all cases, long parallel runs must be avoided. Do not use cable with
an insulation thickness less than or equal to 15 mils (0.4mm/0.015 in.). Use Copper
wire only. Wire gauge requirements and recommendations are based on 75 degrees
C. Do not reduce wire gauge when using higher temperature wire.
Unshielded
THHN, THWN or similar wire is acceptable for drive installation in dry environments
provided adequate free air space and/or conduit fill rates limits are provided. Do not use THHN or similarly coated wire in wet areas. Any wire chosen must have a
minimum insulation thickness of 15 Mils and should not have large variations in
insulation concentricity.
2.4.2 Motor Cable Lengths
Typically, motor lead lengths less than 91 meters (300 feet) are acceptable.
Installation/Wiring
2-5
2.4.3 Power Termination Location Notes
BR1
BR2
(+) DC BUS
TEST POINT
(-) DC BUS
TEST POINT
Figure 2.3 – Power Termination Locations (DC+ and DC-)
2-6
Figure 2.4 – Power Termination Locations (BR1 and BR2)
DBT Reach Drive User Manual
2.5I/O Wiring
T
S
R
Important points to remember about I/O wiring:
• Use Copper wire only. Wire gauge requirements and recommendations are based
on 75 degrees C. Do not reduce wire gauge when using higher temperature wire.
• Wire with an insulation rating of 600V or greater is recommended.
• Control and signal wires should be separated from power wires by at least 0.3
Important: I/O terminals labeled “(–)” or “Common” are
ground and are designed to greatly reduce common mode interference.
Grounding these terminals can cause signal noise.
ATTENTION:Configuring an analog input for 0-20mA operation and
driving it from a voltage source could cause component damage. Verify
!
proper configuration prior to applying input signals.
ATTENTION:Hazard of personal injury or equipment damage exists
when using bipolar input sources. Noise and drift in sensitive input circuits
can cause unpredictable changes in motor speed and direction. Use
speed command parameters to help reduce input source sensitivity.
not referenced to earth
2-7
2.5.1 I/O Terminal Designations
Table 2.2 – I/O Terminal Designations
No.Signal
1
Analog In 1 (-)
2
Analog In 1 (+)
3
Analog In 2 (-)
4
Analog In 2 (+)
12
1
1
1
Factory
DefaultDescription
1
16
32
Isolated3, bipolar, differential
+/- 10V/4-20mA, 11 bit and
sign, 88k ohm input
impedance. For 4-20mA, a
jumper must be installed at
terminals 17 and 18 (or 19
and 20).
Rel.
Param.
320327
5Port Common-For (+) and (-) 10V port
references.
6Analog Out 1 (-)
2
Bipolar (current output is not
bipolar), +/- 10V/4-20mA, 11
7Analog Out 1 (+)
8Analog Out 2 (-)
bit and sign, voltage mode limit current to 5 mA. Current
mode - maxz load resistance
9Analog Out 2 (+)
is 400 ohms.
10HW PTC Input 1-1.8k ohm PTC, Internal 3.32k
ohm pull-up resistor
11
Digital Out 1 - N.C.
4
FaultMax. Resistive Load:
240V AC/30V DC -- 1200VA,
12Digital Out 1 Common
13
Digital Out 1 - N.O.
14
Digital Out 2 - N.C.
4
4
NOT
Fault
NOT
Run
150W
Max. Current: 5A, Min. Load
10mA
Max. Inductive Load:
240V AC/30V DC - 840VA,
105W
15Digital Out 2/3 Com
16
Digital Out 3 - N.O.
4
Run
Max. Current: 3.5A, Min.
Load: 10mA
340347
238
259
380391
2-8
DBT Reach Drive User Manual
Table 2.2 – I/O Terminal Designations
Factory
No.Signal
17
Current In Jumper
In 1
18
19
Current In Jumper
Analog In 2
20
1
- Analog
1
–
DefaultDescription
Placing a jumper across
terminals 17 and 18 (or 19
and 20) will configure that
analog input for current.
(Parameter 320 must be set
ON.)
21–10V Pot Reference–2k ohm minimum load.
22+10V Pot Reference–
23HW PTC Input 1–See above
24
+24VDC
5
–Drive supplied logic input
power.
5
25Digital In Common–
26
24V Common
(5)
–Common for internal power
supply.
27Digital In 1Stop - CF115V AC, 50/60 Hz
- Opto
isolated
Low State: less than 30V AC
28Digital In 2Start
29Digital In 3Auto/M
an.
30Digital In 4Speed
Sel 1
High State: greater than 100V
AC
24V DC
- Opto isolated
Low State: less than 5V DC
High State: greater than 20V
DC
11.2 mA DC
31Digital In 5Speed
Sel 2
Rel.
Param.
361366
Installation/Wiring
32Digital In 6/Hardware Enable Speed
Sel 3
1.
Important: 4-20mA operation requires a jumper at terminals 17 and 18 (or 19 and 20). Drive damage may
occur if jumper is not installed.
2.
These inputs/outputs are dependant on a number of parameters (see “Rel. Param.).
3.
Differential Isolation - External source must be maintained at less than 160V with respect to PE. Input
provides high common mode immunity.
4.
Contacts in unpowered state. Any relay programmed as Fault or Alarm will energize (pick up) when power
is applied to drive and deengergize (drop out) when a fault or alarm exists. Relays selected for other
functions will energize only when that condition exists and will deenergize when condition is removed.
5.
150mA maximum load. Not present on 115V versions.
2-9
32 POSITION I/O PLUG
REMOVE FROM CONTROL PCB
TERMINATE WIRE HARNESS TO PLUG
THEN MATE PLUG TO HEADER AND
FASTEN SCREWS TO 7 in-lbs
SCREW ON PLUG
NUT ON PCB HEADER
Figure 2.6 – I/O Plug
2-10
DBT Reach Drive User Manual
2.5.2 Encoder Terminal Block
Table 2.3 – Encoder Terminal Designations
No.Description
8
+12V
1
DC Power
7+12V <Footnote>(1) DC
Return (Common)
8
6Encoder Z (NOT)Pulse, marker or
5Encoder Z
4Encoder B (NOT)Quadrature B
3Encoder B
1
2Encoder A (NOT)Single channel
1Encoder A
1.
Jumper selectable +5/12V is available on 20B-ENC-2 Encoder Boards only.
2.
Z channel can be used as a pulse input while A & B are used for encoder.
Table 2.4 – Sample Encoder Wiring
I/OConnection ExampleI/OConnection Example
Encoder
Power
1
–
Internal
Drive Power
Internal
+12V DC
(250 mA)
8
7
Common
6
5
to SHLD
4
3
2
1
Encoder
Power
–External
Power
Source
(drive) 12V
DC, 250mA
Internal power
source
250 mA.
registration
input.
input.
or quadrature A
input.
to
+
Common
SHLD
External
Power
Supply
2
Installation/Wiring
Encoder
Signal
–SingleEnded, Dual
Channel
1.
SHLD connection is on drive chassis.
to Power Supply
8
Common
7
6
5
4
3
2
1
Z NOT
Z
B NOT
B
A NOT
A
to SHLD
Encoder
Signal
–Differential,
Dual Channel
to SHLD
8
7
Z NOT
6
Z
5
B NOT
4
B
3
A NOT
2
A
1
2-11
2.5.3 Signal and Control Wire Types
Table 2.5 – Recommended Signal Wire
Signal Type/
Where Used
B e l d e n W i r e T y p e ( s )
(or equivalent)
Description
Minimum
Insulation
Rating
Analog I/O
and PTC
Encoder/
Pulse I/O
<30 m (100
ft.)
Encoder/
Pulse I/O
30 to 152 m
(100 to 500
ft.)
Encoder/
Pulse I/O
152 to 259 m
(500 to 850
ft.)
8760/9460
8770
Combined:
Signal:
Power:
Combined:
Signal:
Power:
Combined:
2
9730
9730/9728
3
8790
4
9892
9730/9728
3
8790
9773/9774
2
0.750 mm
(18AWG),
twisted pair, 100% shield
with drain
0.750 mm
1
.
2
(18AWG), 3
cond., shielded for remote
pot only.
0.196 mm2(24AWG),
individually shielded.
2
0.196 mm2(24AWG),
individually shielded.
0.750 mm2(18 AWG)
0.330 mm2 or 0.500 mm2
4
2
0.196 mm2(24AWG),
individually shielded.
0.750 mm2(18 AWG)
5
0.750 mm2 (18 AWG) or
2
0.500 mm
, individually
shielded pair
300V,
75-90
degrees C
(167-194
degrees F)
2-12
1.
If the wires are short and contained within a cabinet which has no sensitive circuits, the use of shielded
wire may not be necessary, but is always recommended.
2.
9730 is 3 individually shielded pairs (2 channel + power). If 3 channel is required, use 9728.
9773 is 3 individually shielded pairs (2 channel + power). If channel 3 is required, use 9774.
DBT Reach Drive User Manual
Table 2.6 – Recommended Control Wire for Digital I/O
TypeWire Type(s)Description
Minimum Insulation
Rating
UnshieldedPer US NEC or applicable
national or local code
ShieldedMulti-conductor shielded
cable such as Belden
8770(or equiv.)
–300V,
60 degrees C
(140 degrees F)
0.750
2
(18AWG), 3
mm
conductor,
shielded.
Installation/Wiring
2-13
2.5.4 The I/O Control Board
4. Maximum/minimum sizes that the terminal block will accept - these are not recommendations.
4
Figure 2.2 shows the I/O control board and terminal block locations. The control board
provides a mounting point for the various Reach Drive I/O options. To remove the
cassette, loosen the two screw latches as shown in Figure 2.7. (A).
ATTENTION: You must stay within the minimum and maximum wire size
range. Failure to observe this precaution can result in severe equipment
!
damage, bodily injury, or loss of life.
2.5.5 I/O Terminal Blocks
No.NameDescriptionWire Size Range4Torque
1
2
I/O
Terminal
Block
Encoder
Terminal
Block
Signal &
control
connections
Encoder
power &
signal
connections
Table 2.7 – I/O Terminal Block Specifications
Maximum Minimum MaximumRecommended
2.1 mm
2
(14 AWG)
0.30
mm
2
0.6 N-m
(5.2 lb.-in.)
(22
AWG)
0.75 mm
(18 AWG)
2
0.196
2
mm
0.6 N-m
(5.2 lb.-in.)
(24
AWG)
JUMPER
0.6 N-m
(5.2 lb.-in.)
0.6 N-m
(5.2 lb.-in.)
PIN 1
1
2
Figure 2.7 – Reach Drive Typical Control Board and I/O Terminal Blocks
2-14
A
PIN 1
DBT Reach Drive User Manual
2.5.6 Hardware Enable Circuitry
By default, the user can program a digital input as an Enable input. The status of this
input is
disabled
can be utilized. This is done by removing a jumper and wiring the enable input to
“Digital In 6.” (See tables 2.5 and 2.6 for more information).
1. Remove the I/O Control board.
2. Locate and remove Jumper 10 on the Main Control Board (see Figure 2.7).
3. Re-assemble the I/O Control board.
4. Wire enable to Digital In 6.
5. Verify that Digital In6 Sel (366) is set to “1, Enable.”
interpreted by drive software
without
software interpretation, a “dedicated” hardware enable configuration
. If the application requires the drive to be
2.5.7 Resistance Temperature Detector (RTD) Board
Up to eight RTD or NTC (negative temperature coefficient) temperature sensors are
supported by the Reach Drive RTD board. The number of I/O required from an upper
level controller to utilize the RTD Board can be managed by selecting one of several
configuration options.
Installation/Wiring
2-15
PIN 1
PIN 6
RTD PC BOARD
PIN 1
PIN 12
2-16
RTD PC BOARD ASSEMBLED IN ENCLOSURE
Figure 2.8 – RTD Board
DBT Reach Drive User Manual
2.5.7.1 Connections
Gain
123
Mode
Time
123
24
13
112
712
16
S1S2J3 - I/OJ2 - RTD InputsJ2
Figure 2.9 – RTD Board Connections
Table 2.8 – J2 RTD Board I/O Function
PositionI/O Function
1+24V COM
2LOUT1 COM
3LOUT2 COM
4LOUT3 COM
5LIN COM
6AOUT COM
7+24VDC
8LOUT1 NO
9LOUT2 NO
10LOUT3 NO
11LIN
12AOUT
Important: A motor temperature sensor (RTD, NTC, or thermocouple) should be
2.5.7.2 Hardware
The hardware consists of a single PC board with two wired connectors, one for
temperature sensors and the second for power and I/O signals.
considered equivalent to a motor thermostat and wired with the same
considerations. Motor thermostat contacts are generally not isolated from
the drive/controller digital inputs. Therefore, the sensor inputs will not be
isolated on the RTD board.
Installation/Wiring
2-17
RTD/NTC Sourcing
A 2-wire RTD or NTC temperature sensor may be used. A chassis connection is
available for each sensor for use with shielded cable. Each channel requires up to
three connections.
Multiplexer and Amplifier
An analog multiplexer sequentially connects the temperature sensors one at a time to
the analog output. The active sensor channel is indicated by a 3-bit output (A0-A2).
When using an RTD or NTC, a simple voltage divider is formed and the device is
probed differentially.
The sensor voltages are amplified using a high-quality, rail-to-rail instrumentation
amplifier with gain adjustment. To accomodate a variety of sensors and temperature
ranges, an amplifier boosts the analog sensor voltage in order to increase the
temperature resolution. Discrete gains of x10 through x80 are selectable through DIP
switch settings. A 4th order low pass filter rejects normal-mode noise at the analog
input with a cutoff frequency of approximately 16 Hz.
To determine the proper gain setting:
1. Determine R
, the maximum resistance of the sensor over the temperature
MAX
range to be measured.
2. Determine the maximum voltage across R
V
= 1.00V X
MAX
3. Select the largest gain that results in V
R
MAX
MAX
than 10 volts.
using the following equation:
MAX
/ (
R
+ 998)
MAX
* Gain (x10, x20, or x40), being less
2-18
DBT Reach Drive User Manual
Example:
Using a 100 Ohm Pt RTD (a=0.00385) to measure temperatures from 0 degrees
Celsius to 200 degrees Celsius, the maximum resistance occurs at 200 degrees
Celsius and is approximately 177 Ohm. The maximum voltage across the sensor is
151 mV. If the x40 gain is used, the output voltage at 200 degrees Celsius is 6.04
Volts.
NTC/RTD
Sourcing
SA (1 of 8)
SB (1 of 8)
Analog Multiplexer
F
x10
x20
x30
x40
x50
x60
x70
x80
4th Order Low Pass Filter
MAX4194
Gain = 1 + 50K/Rg
Instrumentation Amp
Gain Adjustable
DA
DB
A0
Channel
A1
Address
A2
MAX4194
Rail-to-Rail
5V
S1
50K
12V
x10
100K
11.1K
F
100K 100K
Gain Adjust
DIP Switch Settings, S1
(overall gain)
up
down
Figure 2.10 – Scaled Analog Output for RTD Board
F
= 16Hz
C
100K 100K
LMC6484
Quad Op Amp
Rail-to-Rail
Rg
F
F
0.01 F
12V
10
Analog
Out
0-10V
10
Installation/Wiring
Digital I/O
The digital outputs are isolated with solid state relays. The outputs are internally short
circuit protected. The digital input is optically isolated.
2.5.7.3 Microcontroller Software
A microcontroller monitors three DIP switches to determine the operational mode of
the RTD board. A single “Mode” switch determines whether the board uses an internal
timebase or the digital input as a clock to step through the eight analog input
channels. When using the internal timebase, the other two DIP switches select one of
four clock periods.
2-19
When the “Mode” switch is up (open) the board uses the digital input as an
enable/reset. When the board’s digital input is inactive (open or ground), the analog
output is held at the first channel. When the digital input is active (24V), the
microcontroller sequentially cycles through the eight temperature sensor channels.
Each channel is available at the analog output for the selected period of time. After the
eighth channel is completed, the cycle begins again with the first channel.
Deactivating the digital input will asynchronously reset the sequence back to the first
channel. The “Period” jumpers/dip switches select one of four time periods between
temperature sensor channels.
Table 2.9 – Microcontroller Settings
PeriodS2-2S2-3
1 secondDownDown
10 secondsUpDown
30 secondsDownUp
60 secondsUpUp
When the “Mode” switch (S2-1) is down (closed) the board uses the digital input as an
external clock to sequentially cycle through the eight temperature sensor channels.
The analog output channel advances with both the rising and falling edges of the
digital input. In both modes the active channel is output as a 3-bit binary address on
the RTD board’s digital outputs. An inactive output (open) indicates a “0.” When using
the digital input as an external clock, it may be necessary to monitor the address lines
in order to maintain synchronization with the controller. When using the internal clock
mode, the digital outputs may be ignored to reduce the required number of I/O. In
either mode, the board’s digital input is debounced with a period of 50mS.
2-20
DBT Reach Drive User Manual
CHAPTER 3
Parameter Descriptions
The following information is provided for each parameter along with its description:
Parameter Number:Unique number assigned to each parameter.
Parameter Name:Unique name assigned to each parameter.
Range:Predefined parameter limits or selections. Note that a