Amount Of Data Already Received [D8123] - Mitsubishi Electric FX3U-232-BD User Manual

FX Series PLC User's Manual - Data Communication Edition
Non-Protocol Communication (RS/RS2 Instruction)

12.2.11 Amount of data already received [D8123]

This device stores the amount of data already received.
1. Detailed contents.
This device stores the amount of data already received in 8-bit (1 byte) units.
12.2.12 Header [D8124]
This device sets the header.
1. Detailed contents
When "header provided" is selected in the communication format setting, the lowest-order byte of D8124 is
used.
When data is sent, the data in the lowest-order byte of D8124 is added at the head of the specified send data.
When data is received, receiving begins when the data in the lowest-order byte of D8124 is received.
12.2.13 Terminator [D8125]
This device sets the terminator.
1. Detailed contents
When "terminator provided" is selected in the communication format setting, the lowest-order byte of D8125
is used.
When data is sent, the lowest-order byte of D8125 is added at the end of the specified send data.
When data is received, receiving is completed when the data in the lowest-order byte of D8125 is received.
12.2.14 Time-out time setting time [D8129]
This device sets the time-out time setting.
1. Detailed contents
This device sets the error evaluation time (in 10-ms units) used when receiving of data is interrupted.
The setting range is from 1 to 255 (10 ms to 2550 ms).
When "0" is set in D8129, the time-out time is set to 100 ms.
2. Cautions on use
• In all PLCs except FX
• Even if the time-out time setting is changed while the RS instruction is being driven, it is not reflected.
After changing the setting, set the RS instruction to OFF and ON.
• When setting the time-out time setting in FX
backed) device (M8120) to ON.
12.2.15 Communication parameter display [D8405]
This device stores the communication parameters set in FX
1. Detailed contents
When the PLC power is turned ON, D8405 stores the contents of the communication parameters.
The contents of the parameters are the same as those of the communication format setting device (D8120).
(FX), FX and FX PLCs, the time-out time setting can be set using a parameter.
2 2C 0N
PLCs, set the communication setting latched (battery
0N
12.2 Details of related devices (RS instruction)
, FX , FX , FX and FX
3S 3G 3GC 3U
12 Related Data
A
B
C
D
E
F
G
H
PLCs.
3UC
I
Apx.A
F-95