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Output value setting for fieldbus error
Set the output value of the I/O module for each case, such as when the CPU module status of the master station changes or
a fieldbus error occurs.
The output value changes depending on the following three settings.
• The master station CPU module device specified as the transfer destination of the bit address of the NZ2FT-MT register in
the simple CPU communication setting (when the master module is the RJ71EN71)
• NZ2FT-MT parameter "Output behaviour on fieldbus error"
• Parameter "Substitute value" for each I/O module
However, the data sent from the NZ2FT-C24 to the external device is not affected by the setting of the NZ2FT-MT parameter
"Output behaviour on fieldbus error".
Ex.
For the digital output module (master module: RJ71EN71)
Master station status
NZ2FT-MT bit address transfer
destination: CPU module device Y
Data link in
CPU module RUN state
operation
CPU module: RUN STOP
CPU module PAUSE state
When the CPU module is reset
When in CPU module stop error
Disconnected (fieldbus error occurred)
Master station status
NZ2FT-MT bit address transfer
destination: other than CPU module
device Y
Data link in
CPU module RUN state
operation
CPU module: RUN STOP
CPU module PAUSE state
When the CPU module is reset
When in CPU module stop error
Disconnected (fieldbus error occurred)
*1 Maintains the connection for the time set in the NZ2FT-MT parameter "Modbus connection timeout". It is disconnected when the set time
has elapsed.
11 NZ2FT-MT
292
11.4 Functions
NZ2FT-MT parameter "Output behaviour on fieldbus error" setting
0: All outputs off
(All outputs are
turned off.)
Last
Last
output
output
value is
value is
off
on
OFF
ON
OFF
OFF
OFF
ON
*1
OFF
OFF
OFF
ON
OFF
OFF
NZ2FT-MT parameter "Output behaviour on fieldbus error" setting
0: All outputs off
(All outputs are
turned off.)
Last
Last
output
output
value is
value is
off
on
OFF
ON
OFF
ON
OFF
ON
*1
OFF
ON
OFF
ON
OFF
OFF
1: Enable substitute value (A substitute
value is output.)
The I/O module
The I/O module
parameter
parameter
"Substitute value"
"Substitute value"
set to 1
set to 0
Last
Last
Last
output
output
output
value is
value is
value is
off
on
off
OFF
ON
OFF
OFF
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
ON
OFF
ON
ON
OFF
1: Enable substitute value (A substitute
value is output.)
The I/O module
The I/O module
parameter
parameter
"Substitute value"
"Substitute value"
set to 1
set to 0
Last
Last
Last
output
output
output
value is
value is
value is
off
on
off
OFF
ON
OFF
OFF
ON
OFF
OFF
ON
OFF
OFF
ON
OFF
OFF
ON
OFF
ON
ON
OFF
2: Hold last value
(The last output
value is held.)
Last
Last
Last
output
output
output
value is
value is
value is
on
off
on
ON
OFF
ON
OFF
OFF
OFF
ON
OFF
ON
OFF
OFF
OFF
ON
OFF
ON
OFF
OFF
ON
2: Hold last value
(The last output
value is held.)
Last
Last
Last
output
output
output
value is
value is
value is
on
off
on
ON
OFF
ON
ON
OFF
ON
ON
OFF
ON
ON
OFF
ON
ON
OFF
ON
OFF
OFF
ON
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Troubleshooting
