Creating Programs - Mitsubishi Electric FX3U-232-BD User Manual

FX Series PLC User's Manual - Data Communication Edition
N:N Network
7.

Creating Programs

This chapter explains how to set the N:N Network and how to create programs.
In N:N Network, pattern 0, 1 or 2 can be set according to the refresh range value. The number of used
devices varies depending on the pattern.
In N:N Network using (including) the FX
7.1 Checking Contents of Related Devices
The tables below show the devices used by the N:N Network.
1. Devices for setting the N:N Network
These devices are used for setting the N:N Network. Setting these devices is essential for using N:N Network.
Device Name
Parameter
M8038
setting
M8179 Channel setting
Station number
D8176
settings
Slave station
D8177
quantity setting
Refresh range
D8178
setting
Number of
D8179
retries
D8180 Monitoring time
or FX Series, only pattern 0 is applicable.
0N 1S
This device is a flag for setting communication parameters, and is used to
check for absence/presence of N:N Network program also.
Do not set this device to ON in the sequence program.
Set the channel of the communication port to be used (in the FX
FX and FX ).
3U 3UC
When "OUT M8179" program does not exist: ch 1
When "OUT M8179" program exists: ch 2
Set the station number used in the N:N Network.
Master station: 0, slave station: 1 to 7
[Initial value: 0]
Set the total number of slave stations.
This setting is not required in PLCs working as slave stations.
[Initial value: 7]
Select the desired pattern of device points used for communication.
This setting is not required in PLCs working as slave stations.
[Initial value: 0]
Only pattern 0 is applicable when a FX
When a response is not given even after communication is repeated the
specified number of times, it is regarded as an error.
Errors in other stations can be checked.
This setting is not required in PLCs working as slave stations.
[Initial value: 3]
Set the time (50 to 2550 ms) for communication error in 10 ms units.
This setting is not required in PLCs working as slave stations.
[Initial value: 5]
7.1 Checking Contents of Related Devices
Description
or FX Series is included.
0N 1S
7 Creating Programs
Set value
, FX ,
3G 3GC
0 to 7
1 to 7
0 to 2
G
0 to 10
5 to 255
Apx.A
B-33
A
B
C
D
E
F
H
I