On-Demand Data Head Device Number Specification [D8127 And D8427] - Mitsubishi Electric FX3U-232-BD User Manual

FX Series PLC User's Manual - Data Communication Edition
Computer Link

9.2.10 On-demand data head device number specification [D8127 and D8427]

These devices set the head data register device number containing the data to be sent using the on-demand
function in a sequence program.
1. Detailed contents
These devices set the head data register device number containing the data to be sent using the on-demand
function.
In all PLCs except FX
the communication port, use D8127.
For FX , FX
3G 3GC
In FX , FX
3G 3GC
If there is an error in the set data, the on-demand error flag (M8128 or M8428) turns ON.
2. Cautions on use
When setting the on-demand data head device number specification device (D8127 or D8427), set the flag
using the pulse operation type.
While the on-demand send processing flag (M8127 or M8427) is ON, do not write data.
9.2.11 On-demand data quantity specification [D8128 and D8428]
These devices set the amount of data to be sent from a PLC using the on-demand function in a sequence
program.
1. Detailed contents
These devices set the amount of data to be sent using the on-demand function. Set the amount of data 64 or
less.
In all PLCs except FX
For FX , FX
3G 3GC
In FX , FX
3G 3GC
If an error is included in the set data, the on-demand error flag (M8128 or M8428) turns ON.
2. Cautions on use
When setting the on-demand data quantity specification device (D8128 or D8428), set the flag using the pulse
operation type.
While the on-demand send processing flag (M8127 or M8427) is ON, do not write data.
D-96
, FX , FX and FX
3G 3GC 3U
, FX and FX PLCs using the communication port ch1, use D8127.
3U 3UC
, FX and FX PLCs using the communication port ch2, use D8427.
3U 3UC
, FX , FX and FX
3G 3GC 3U
, FX and FX PLCs using the communication port ch1, use D8128.
3U 3UC
, FX and FX PLCs using the communication port ch2, use D8428.
3U 3UC
PLCs and in FX , FX
3UC 3G
PLCs using the communication port, use D8128.
3UC
9 Related Data
9.2 Details of Related Devices
, FX and FX PLCs using
3GC 3U 3UC