Pulse test sources, Required signals for line monitoring – Rockwell Automation 1755-OF8 GuardPLC Controller Systems User Manual
Page 93

Publication 1753-UM001C-EN-P - March 2010
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Wire and Configure the 1753-IB16XOB8 Module Chapter 8
Required Signals for Line Monitoring
Line monitoring must be configured by using these system signals for
1753-IB16XOB8 modules on the Outputs tab of the digital outputs
Signal Connections dialog box in RSLogix Guard PLUS! software.
See
for a complete list of 1753-IB16XOB8 module
variables.
Pulse Test Sources
The two digital pulse test sources (PO) can be used for short-circuit or
line break monitoring of digital inputs. For information on configuring
pulse test sources for line control, see
Each output has four terminals for wiring connections.
Name
Description
Setting
DO.LSLB period
The time between steps in Line Short Line
Break (LSLB) monitoring
Values in one second increments from
1…100.
DO.LSLB time
The duration of LSLB monitoring
Values in one millisecond increments from
0…50 ms. The default is 0 ms.
DO[xx].2-pole
Configures the module for 2-pole operation
1 = 2-pole operation.
0 = 1-pole operation.
DO[xx].+Value
Output value for DO channels (DO+)
1-pole (Value: 0 or 1).
2-pole, identical to DO- (Value: 0 or 1).
DO[xx].-Value
Output value for DO channels (DO-)
1-pole (Value: 0 or 1).
2-pole, identical to DO+ (Value: 0 or 1).
DO[xx].LSLB monitoring
Configures line control
1 = set for LSLB (line control)
0 = no LSLB (line control)
DO[xx].LS monitoring with reduced
voltage
Configures line control with reduced voltage
1 = reduced signal voltage level
0 = normal signal voltage level
DO[xx][xx].in pairs
Configures line control with channel pairs
Pair 1 = channel 1 [01] and channel 2 [02]
Pair 2 = channel 3 [03] and channel 4 [04]
Pair 3 = channel 5 [05] and channel 6 [06]
Pair 4 = channel 7 [07] and channel 8 [08]
ATTENTION
Pulse test sources must not be used as safety-related outputs.
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