Rockwell Automation 1760-xxxx Pico GFX-70 Controllers User Manual - Manual (Page 361)

Publication 1760-UM002B-EN-P - March 2005
Inside Pico GFX-70 8-7
Monitoring of Short-Circuit
and Overload with
1760-IB12XOB8 Depending on the type of expansion module in use, it is possible to use the
internal inputs I16, R15 and R16 to monitor for short-circuits or overloads on
an output.
• Pico GFX-70:
– I16: Group fault signal for outputs Q1 to Q4.
• 1760-IB12XOB8:
– R16: Group fault signal for outputs S1 to S4.
– R16: Group fault signal for outputs S5 to S8.
Examples
The following examples are for I16 = Q1 to Q4.
Example 1: Selecting an Output with Fault Indication
Figure 8.5 Circuit diagram for fault output via I16
The above circuit diagram functions as follows:
If a transistor output reports a fault, M16 is set by I16. The break contact of
M16 switches off output Q1. M16 can be cleared by resetting the Pico
GFX-70 power supply.
Example 2: Output of Operating State
Figure 8.6 Output of operating state
State
Outputs I16, R15 or R16
No fault found “0” = switched off (make contact)
At least one output has a fault “1” = switched on (make contact)
IMPORTANT
I16 can only be edited with Pico GFX-70 versions which
have transistor outputs.
I 01----M 1 6-------------------[ Q 01
I 16--------------------------S M 16
I 01----M 16-------------------[ Q 01
I 16---------------------------S M 16
M 16---------------------------[ Q 04