User`s manual

12-14
M-net (Master Station) Function
12
12-4 Errors and treatment
12-4-1 Indicators
The lamps on the master station (JW-32CUM1) light according to the operating conditions of the M-
net.
JW-32CUM1
DN - MCM - MCU
FLT
CM1
CM2
CM-M section on the display panel
Lamp
name
Details Condition when lit Response
CM
Actively
communicating
This lamp is lit
during communication.
-----
SD
Transmitting
data
This lamp flashes when
transmitting data.
RD Receiving data
This lamp flashes when
receiving data.
RS
Request to
send
This lamp flashes during
communication.
T Testing
This lamp is lit during
testing (used for inspection
before delivery).
ER Error
This lamp will light when a
communication error
occurs.
(The error codes are
displayed as 80 to 1.)
- Check for a disconnected communication
cable or bad wiring.
- Check the switch settings on the master and
slave stations.
- Check the system memory settings on the
master and slave stations.
- Check the power supply voltage to the slave
stations.
- Replace the JW-32CUM1 or slave modules.
FT Fault
This lamp will light if the
watchdog timer times out.
- Set switch number SW5 to "7: M-net."
- Replace this JW-32CUM1.
- Replace the rack panel.
80 to 1 Error code
When an error lamp lights,
the error code will be
displayed.
For details about the error codes, see page
12-16.