User`s manual

FX communication
N:N network 4
4-2
4.1.2 Data Registers
R : Read only W : Write only M : Master station L : Slave station
*1 The number of communication errors occurred in its own station cannot be counted in the
CPU error status, the program error status or the stop status.
*2 Number (Same meaning but looks better.) in accordance with the slave station No.
Slave station No.1 is D204, D212, slave station No.2 is D205, D213,
…
slave station No.7 is D210, D218.
*3 Number (Same meaning but looks better.) in accordance with the slave station No.
Slave station No.1 is D8204, D8212, slave station No.2 is D8205, D8213,
…
slave station No.7 is D8210, D8218.
Attribute
Data Registers
Name Description
Response
type
FX
0N
,
FX
1S
FX
1N
, FX
2N
,
FX
2NC
R D8173 Station No. Saves its own station No. M, L
R D8174
Total number of slave
stations
Saves total number of
slave stations
M, L
R D8175 Refresh range Saves refresh range M, L
W D8176 Station number setting Sets its own station No. M, L
W D8177
Total slave station number
setting
Sets total number of
slave stations
M
W D8178 Refresh range setting Sets refresh range M
W/R D8179 Retry count setting Sets retry count M
W/R D8180 Comms time-out setting Sets comms time-out M
R D201 D8201 Current network scan time
Saves current network
scan time
M, L
R D202 D8202
Maximum network scan
time
Saves maximum network
scan time
M, L
R D203 D8203
Number of communication
error at master station
Number of
communication error at
master station *1
L
R
D204 to
D210 *2
D8204 to
D8210 *3
Number of communication
error at slave station
Number of
communication error at
slave station *1
M, L
R D211 D8211
Code of communication
error at master station
Code of communication
error at master station *1
L
R
D212 to
D218 *2
D8212 to
D8218 *3
Code of communication
error at slave station
Code of communication
error at slave station *1
M, L

D219 to
D255

Not used For internal processing

Note;
• Devices M503-M511 and D201-D255 in the FX
0N
and FX
1S
cannot be used in the
program. These devices are used by the N:N network.