Panasonic FP3

FP3 MEWNET-TR
Chapter4-1. Page.56
52
2. Slave Station
x The slave station’s operating mode is set by the operation mode selector of the FP I/O transmitter unit.
x When changing the settings, first turn OFF the power supply, then turn it ON again.
OFF
ON
1234
MODE SW.
Note:
Operation mode selector
x
Check the selector number indication on the
unit when setting the operation mode selector.
FP I/O transmitter unit
1) Operation mode selector setting
x
Selector number 1:
Communication mode selection of FP I/O transmitter unit
- The selector can be set to either ON or OFF when the unit is used as a slave station of
a MEWNET-TR system.
- Regarding the communication mode, see page 18, “J Operation mode selector setting.”
x
Selector number 2:
System configuration selection
Set the selector to ON when the unit is used as a slave station of a MEWNET-TR system,
and set it to OFF when the unit is not used as a slave station.
x
Selector number 3:
Output operation condition of the slave station during a communication error
This selector allows you to select whether the slave stations’ outputs are turned OFF or
held when the master station’s I/O control stops.
- When the transmission cable between the unit and the master station disconnects during
output operation, causing a communication error.
- When the transmission cable between slave stations disconnects or when the power
supply to a slave unit stops, and the master station’s operation mode selector number 2
is set to ON (continuance of I/O control for properly operating slave stations).
Example 1:
When the cable between slave stations 1 and 2 disconnects
When selector number 3 of each slave station is set to ON, the output is held even if the
output of slave station 2 disconnects. If the selector is set to OFF, the slave station’s output
turns OFF when the cable disconnects.
Master
station
Slave
station 1
Slave
station 2
Disconnection
Example 2:
When the power supply to slave station 2 is cut OFF
When selector number 3 of each slave station is set to ON, the outputs of slave stations 1
and 3 are held. If the selector is set to OFF, the outputs of slave stations 1 and 3 turn OFF.
Master
station
Slave
station 1
Slave
station 2
Slave
station 3
No power supply
See page 54, “3. Operation Mode Setting When an Error Occurs.”
Notes:
4-1. Operation Mode Setting
x
When an output type expansion FP I/O terminal unit is connected, the hold
setting of selector number 3 is effective for the unit’s outputs.
x
The setting of selector number 3 of the input type FP I/O transmitter unit is also
effective if an output type expansion FP I/O terminal unit is connected.
x
The output of slave station 2 turns OFF when no power is supplied to
station 2.