Siemens GCP5000 Instruction & Installation Manual page 415

9.3 Input Functions and Physical Input Assignments
GCP 5000 (GCE) PSO, RIO module, and Crossing Controller physical inputs are user
programmable and are dedicated to specific input terminals on the GCP5000 (GCE) chassis.
The functions of those specific terminals are programmable and are not dedicated to a specific
function.
9.3.1 Turning on Inputs
When a physical input is required to perform a specific application function the function must
first be enabled using the appropriate configuration menu. For example, when PSO RX1 Enable
for PSO 1 is to be used, PSO RX1 Enable must be enabled using the PSO 1 Receiver 1 menu.
The physical input must then be assigned (mapped) to the function using the Input Assignment
menu. For example, PSO RX1 Enable mapped to IN 1.1
9.3.1.1 General Guidelines for Using Input Functions
In general, any input function can be assigned to any of the available GCP 5000 (GCE) physical
inputs. The same input function can be allocated to multiple physical inputs. As a result, the
allocated input function will de-energize when either input is de-energized. For example, with
PSO RX1 Enable allocated to both IN 1.1 and IN 1.2, PSO RX1 Enable will de-energize if IN
1.1 and IN 1.2 are de-energized.
This ANDing also occurs if you set the same input function from a Logic Equation or a physical
input.
For an input function to appear in the selection list for a particular physical input, the input
function must be enabled. For example, for AND 2 Enable to appear in the list:
•
AND 2 must be used, by setting some its terms so they are not FALSE and
•
AND 2 Enable Used set to Yes
If an input function is enabled but is not assigned to a physical input, it is treated as de-
energized. For example, when the AND 2 Enable function is enabled but not assigned to a
physical input.
If an input function is assigned to a physical input and the enabling condition is turned off, the
input is ignored but the function remains assigned to the output. For example, when AND 1 XR
Enable is mapped to IN 1.1 and the AND 2 Enable Used status field is returned to No. the IN
1.1 assignment field is still set to AND 1 XR Enable. However, the input is de-energized.
The physical input does not have to be wired high, as returning the input assignment field to Not
Used removes the assignment and makes troubleshooting easier.
SIG-00-22-02
Version : B.1
THE ANDING DOES NOT OCCUR IF YOU SET THE INPUT FROM
A VITAL COMMS RECEIVE CHANNEL. DO NOT ALLOCATE THE
SAME INPUT FUNCTION TO BOTH A VITAL COMMS RECEIVE
CHANNEL AND A VITAL INPUT OR EQUATION.
I/O FUNCTIONS AND ASSIGNMENTS
WARNING
9-13
JUNE 2022 (Revised September 2022)