
62
OUT2 ON/OFF action hysteresis setting:
0.1 to 100.0 ( ) (Default value: 1.0 )
DC input: 1 to 1000
OUT2 high limit, OUT2 low limit: 0 to 100% (Not available for ON/OFF action)
(Default value: OUT2 low limit: 0%, OUT2 high limit: 100%)
OUT2 action mode selection:
Air cooling (Linear characteristic) (Default value)
Oil cooling (1.5th power of the linear characteristic)
Water cooling (2nd power of the linear characteristic)
14. Troubleshooting
If any malfunction occurs, refer to the following items after checking the power supply to
the master and the slave (NCL-13A).
14.1 Communication
Problem
Presumed cause and solution
Communication failure
• The connection or wiring of communication is not secure.
• Burnout on the communication cable or imperfect contact
with the connector.
• Communication speed of the slave does not coincide with
that of the master.
• The data bit, parity and stop bit of the master do not
accord with those of the slave.
• The instrument number (address) of the slave does not
coincide with that of the command
• The instrument number (address) of the slave is duplicated
in multiple slaves
Though it is able to
communicate, the
response is “NAK”.
• Check whether a non-existent command code has been
sent.
• The setting command data goes outside the setting range
of the slave.
• The unit cannot be set when functions such as AT is
performing.
14.2 Control
Problem
Presumed cause and solution
PV (Process variable)
does not rise.
• The sensor is out of order.
Replace the sensors.
• Sensor is not securely connected to the instrument input
terminals, or actuator is not securely connected to the
instrument output terminal.
• Ensure that the wiring of sensor terminals or actuator
terminals are correct.
The control output
remains in an ON
status.
• OUT1 (OUT2) low limit value is set to 100% or higher.
Set it to a suitable value.
The control output
remains in an OFF
status.
• OUT1 (OUT2) high limit value is set to 0% or less.
Set it to a suitable value.