
3. DISPLAYING PMC INPUT/OUTPUT
SIGNALS AND INTERNAL RELAY
(PMCDGN)
B–61863E/15
PMC–NB6 MANIPULATION
674
This is the function to change the status of the signals at arbitrary PMC
address forcibly. If the input X is forced with this function, the sequence
program can be debugged without the machine. If the output Y is forced,
the wiring for the machine can be checked without the sequence program.
This function has two kinds of input modes. These modes can be used
properly according to the purpose.
(1)Forcing mode
This mode is applied to all of PMC addresses. However, the signals
changed by this function must be overwritten when the sequence
program or operator input in the same address. As a result, the forced
I/O function becomes ineffective.
Machine
Ladder
X,Y
G,F,R,T,K,C,D
I/O address
overwrite
overwrite
overwrite
Ex1: R0 is forced in the following ladder program.
MOVE 1111
1111
K0
R0
X0.0
1. The initial state of the signal is as follows.
X0.0 = OFF, K0 = 55H, R0 = 00h
2. R0 is forced to FFh.
X0.0 =OFF, K0 = 55h, R0 = FFh
3. If X0.0 is turned ON, R0 is overwritten by the ladder program.
X0.0 = ON, K0 = 55h, R0 = 55h
3.7
FORCED
INPUT/OUTPUT
FUNCTION
3.7.1
Overview
3.7.1.1
Input mode