B-50
FX Series PLC User's Manual - Data Communication Edition
N:N Network
10 Related Data
10.1 Related Device List
10.1.2 For FX1S and FX0N PLCs
1. Bit devices
R: Read only (used as a contact in program)
M: Master station (station No. 0) L: Slave station (station No. 1 to 7)
2. Word devices (data registers)
R: Read only (used as a contact in program) R/W: Read or Write
M: Master station (station No. 0) L: Slave station (station No. 1 to 7)
Device
number
Name Description
Initial
value
Detec-
tion
R/W
Devices for communication setting
M8038 Parameter setting Communication parameter setting flag — M, L R
Devices for checking communication status
M504 Data transfer sequence error
Turns ON when a data transfer sequence
error occurs in the master station.
—LR
M505 to M511 Data transfer sequence error
Turns ON when a data transfer sequence
error occurs in a slave station.
However, data transfer sequence errors within
the slave station itself cannot be detected.
—M, LR
M503 Data transfer sequence ON
Remains ON while data transfer is being
executed.
—M, LR
Device
number
Name Description
Initial
value
Detec-
tion
R/W
Devices for checking
D8173
Corresponding station
number settings status
Provided to check the station number. — M, L R
D8174
Slave station quantity setting
status
Provided to check the number of slave
stations.
—M, LR
D8175 Refresh range setting status Provided to check the refresh range. — M, L R
Devices for communication setting
D8176
Corresponding station
number settings
Provided to set the station number. 0 M, L R/W
D8177 Slave station quantity setting
Provided to set the number of slave stations
used in communication.
7MR/W
D8178 Refresh range setting Provided to set the refresh range. 0 M R/W
D8179 Number of retries Provided to set the number of retries. 3 M R/W
D8180 Monitoring time
Provided to set the no-response monitoring
time.
5MR/W
Devices for checking communication status
D201 Present link scan time
Stores the current value of the network cycle
time.
—MR
D202 Maximum link scan time
Stores the maximum value of the network
cycle time.
—MR
D203
Data transfer sequence error
count
Stores the amount of data sequence errors
that occurred in the master station.
—LR
D204 to D210
Data transfer sequence error
count
Amount of data sequence errors that
occurred in a slave station.
However, data sequence errors that occurred
within the slave station itself cannot be counted.
—M, LR
D211 Data transmission error code Stores the error code for the master station. — L R
D212 to D218 Data transmission error code
Stores the error code for a slave station.
However, data sequence errors that occurred
within the slave station itself cannot be counted.
—M, LR
D219 to D255 Not applicable Provided for the internal processing. — — —
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