NSK MEGATORQUE M-ESB-YSB2020AB300 - Page 325

— A-2 —
B
B
3
3
t
t
y
y
p
p
e
e
B
B
5
5
t
t
y
y
p
p
e
e
Appendix 1: Monitoring Input/Output Signals
IO: Input/Output Monitor (B3 and 23 type Driver Units)
2
2
3
3
t
t
y
y
p
p
e
e
2
2
5
5
t
t
y
y
p
p
e
e
The readout of Input/Output with the IO command differs with the polarity setting by
AB parameter as well.
Figure A-2
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)
l Difference of ON/OFF signals and the polarity (AB parameter) of the emergency stop (EMST)
input are shown in Figure A-2.
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 If the EMST input is set to the 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 the timing of (1) or (2).
Table A-3
IO data Readout
IO0
* 0 * * * * * * / * * * *
(1)
IO1
* 0 * * * * * * / * * * *
IO0
* 1 * * * * * * / * * * *
(2)
IO1
* 1 * * * * * * / * * * *
u If the 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 the
opposite at timing of (1) or (2).
Table A-4
IO data Readout
IO0
* 0 * * * * * * / * * * *
(1)
IO1
* 1 * * * * * * / * * * *
IO0
* 1 * * * * * * / * * * *
(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.