Mitsubishi Electric QJ71E71-100 User Manual page 276

(3) Functions
• This instruction reads the error information of the module specified by Un.
Item
Initial error
Open error
• Completion of the ERRRD instruction can be checked with Completion device (D1)+0 and (D1)+1.
• Completion device
(D1)+0:
• Completion device
(D1)+1:
[Operation while the ERRRD instruction is being executed]
Program
ERRRD instruction
Completion device
Completion device + 1
• The ZP.ERRRD instruction is executed on the rising edge (OFF ON) of the read command.
(4) Errors
• If a dedicated instruction ends with an error, Completion device (D1)+1 turns on, and the error code is stored
in Completion status (S1)+1.
274
Target specification
(S1)+2 specification (S1)+3
0000
H
0001 to 0010
H H
Turns on at the END process of the scan where the ERRRD instruction is
completed and turns off at the next END process.
Turns on and off depending on the completion status of the ERRRD instruction.
• Normal completion:
• Abnormal end:
END
Scan
process
Executed
Reading the
error information
Function Error information to be read
0000 Initial error code (address: 69
H
Open error code for a connection with the
0000
H
connected device (address: 7C
Stays off and does not change.
Turns on at the END process of the scan where
the ERRRD instruction is completed and turns off
at the next END process.
END
Scan Scan
process
Abnormally ended
(buffer memory)
)
H
, 86 ...)
H H
END
process