Mitsubishi Electric MELSEC-Q Structured Programming Manual page 214

FXCPU Structured Programming Manual
[Device & Common]
Number and name
Step ladder and annunciator
*1
[D]8040
ON state relay number 1
*1
[D]8041
ON state relay number 2
*1
[D]8042
D8040 stores the smallest number of active state relays, and
ON state relay number 3
D8041 stores the second-smallest number of active state
relays.
*1
[D]8043
In this way, D8040 to D8047 sequentially store up to 8 active
ON state relay number 4
state relays.
*1
[D]8044
Target state relay numbers are as follows:
ON state relay number 5
• FX
• FX
*1
[D]8045
• FX
ON state relay number 6
*1
[D]8046
ON state relay number 7
*1
[D]8047
ON state relay number 8
[D]8048 Unavailable
*1
[D]8049
Stores the smallest number of active annunciator relays
Smallest active state
among S900 to S999 when M8049 is ON.
relay number
[D]8050 to [D]8059 Unavailable
*1. Activated when the END instruction is executed.
Error detection (Refer to Chapter 5 for details.)
Unconnected head I/O number in I/O configuration error
When programmed input/output numbers are unconnected,
D8060 stores the head unconnected device number.
Example: When X020 is unconnected
[D]8060
[D]8061 Error code for PLC hardware code
[D]8062 Error code for PLC/PP communication error
Error code for parallel link error
[D]8063
Error code for RS-232C communication error
[D]8064 Error code for parameter error
[D]8065 Error code for syntax error
[D]8066 Error code for circuit error
[D]8067
Error code for operation error
*2
Latched step number where operation error has occurred
D 8068
*2
[D]8069 Step number where M8065 to M8067 error has occurred
*2. Cleared when the PLC mode switches from STOP to RUN.
*3. Available in Ver. 1.20 or later.
212
Content of register
, FX : S0 to S63
0 0S
0N : S0 to S127
, FX : S0 to S899
U 2C
1 0 2 0 Value converted into BCD
Device number 10 to 337
1:Input X 0:Output Y
*2
4 Operations of Special Devices (M8000 and later, D8000 and later)
4.1 Special Device List (M8000 and later, D8000 and later)
Applicable model
FX ,
0S
FX
0N
FX
0
- -
- -
- -
- -
- -
*3
-
*2
Corresponding
FX FX
U 2C
special device
M8047
- - -
M8049
- - -
M8060
M8061
M8062
M8063
M8064
M8065
M8066
M8067
M8068
M8065 to M8067