Toa NX-100S Installation - Manual (Page 109)

Contact input Contact output Network communication
Input OFF
Power ON
Output OFF
OFF
Control result: OK
6-6
Chapter 6: APPENDIX
1.8.3. Operation at system startup
When contact bridges are registered, the contact
input device transmits contact input status
information to the contact output device
immediately after power is switched ON. This
operation is performed for all registered contact
inputs.
Note
If a contact bridge output destination device is
not connected to the network or if the power is
OFF, the contact input device repeatedly
continues retry operation after power is switched
ON. Whenever control results in failure, the
ERROR indicator on the front panel lights for one
second.
1.8.4. Operation at power-off or power restoration
The following examples show the contact status changes from the status illustrated below when the control
input or output device's power is switched ON or OFF.
Network Contact input device Contact input ON Contact output ON Contact output device
Power ON Power ON
[Operations caused by a change in the contact input device’s power status]
Contact input
device
Contact input ON
ON
Contact output ON
ON
Contact output
device
ON ON
Power OFF
Power ON
Network
(Transmits initial status
information when power
is switched ON.) (Receives contact ON
information.)
(Holds current status in
the absence of changed
information.)
[Operations caused by a change in the contact output device’s power status]
Contact input
device
Contact input ON
ON
Contact output ON
OFF
Contact output
device
ON OFF
Power OFF
Power ON
Network
(Output turns OFF when
power is switched OFF.)
(No information is
transmitted because no
change is detected in
the contact input device.
Mismatching occurs
between contact input
and output statuses.)