— A-5 —
B
B
3
3
t
t
y
y
p
p
e
e
B
B
5
5
t
t
y
y
p
p
e
e
2
2
3
3
t
t
y
y
p
p
e
e
2
2
5
5
t
t
y
y
p
p
e
e
Appendix 1: Monitoring Input/Output Signals
IO: Input/Output Monitor
（B5 and 25 type Driver Units）
l The readout of Input/Output with the IO command differs with the polarity setting by AB
parameter as well.
Figure A-4
closed
open
ON (Active)
OFF (Inactive)
closed
open
EMST
Normally open contact
(A contact)
Normally closed contact
(B contact)
Input signal
Parameter AB
(1) (2)
Difference of ON/OFF signals and the polarity (AB parameter) of the emergency stop (EMST)
input are shown in Figure A-3.
IO0: Reports the state of circuit in regard to input signal.
IO1: Reports the state of execution of the function (in this case EMST) in regard to
input. [ON (active) or OFF (inactive)]
u When EMST input is set to normally open contact (ABX0XXXXXX)
If the EMST input is set to the normally open contact, the readouts of IO0 and IO1 are the same
at timing of (1) or (2).
Table A-7
IO data Readout
A
B
C D E F G H I J K
IO0
*
0
* * * * * *
/
* *
A
B
C D E F G H I J K
(1)
IO1
*
0
* * * * * *
/
* *
A
B
C D E F G H I J K
IO0
*
1
* * * * * *
/
* *
A
B
C D E F G H I J K
(2)
IO1
*
1
* * * * * *
/
* *
u When EMST input is set to normally closed contact (ABX1XXXXXX)
If the EMST input is set to the normally closed contact, the readouts of IO0 and IO1 are opposite
at timing of (1) or (2).
Table A-8
IO data Readout
A
B
C D E F G H I J K
IO0
*
0
* * * * * *
/
* *
A
B
C D E F G H I J K
(1)
IO1
*
1
* * * * * *
/
* *
A
B
C D E F G H I J K
IO0
*
1
* * * * * *
/
* *
A
B
C D E F G H I J K
(2)
IO1
*
0
* * * * * *
/
* *
In these examples as shown above, the readout with IO1 will show that the EMST signal is
functionally ON or OFF regardless of the setting to the normally open or closed contact.
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