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26.6 Table of Special Internal Relays
WR900 (specified in word)
Relay
number
R9000
Self-diagnostic error flag
R9001
Unused
Function cassette I/O error
R9002
flag
R9003
Function cassette error flag
R9004
I/O verification error flag
Backup battery error flag
R9005
(current type)
Backup battery error flag
R9006
(hold)
Operation error flag (hold)
R9007
(ER flag)
Operation error flag (latest)
R9008
(ER flag)
R9009
Carry flag (CY flag)
R900A
> Flag
R900B
= Flag
R900C
< Flag
R900D
Auxiliary timer contact
R900E
COM0 port communication
(R9130)
error
R900F
Constant scan error flag
(Note 1): The special internal relay in parentheses is also allocated the same function.
Name
When an error flag self-diagnostic error occurs, it is ON.
→ Self-diagnostic result stored in DT90000.
When an abnormality is detected in the I/O type function cassette,
it is ON.
When an abnormality is detected in the function cassette, it is ON.
When an I/O verification error is detected, it is ON.
When a battery error is detected, it turns to ON.
Even if you choose not to notify battery error in the system
register, it is also ON when the battery runs out.
When a battery error is detected, it turns to ON.
Even if you choose not to notify battery error in the system
register, it is also ON when the battery runs out.
When a battery error is detected, it is maintained after the reset.
→OFF when the power is cut.
When you start running, it is ON if an error occurs, and it is
maintained during operation.
→The address where an error occurred stored in DT90017.
(Display the operation error occurred initially.)
It is ON whenever an operation error occurs.
→The address where an error occurred stored in DT90018. Every
time a new error occurs, the content will be updated.
When the operation result overflows or underflows, or when
performing the result of the shift system instruction, the flag
resets.
Execute comparison instruction, if the comparison result is large,
it is ON.
Execute comparison instruction, if the comparison result is equal,
it is ON.
Execute operation instruction, if the comparison result is 0, it is
ON.
Execute comparison instruction, if the comparison result is small,
it is ON.
Execute auxiliary timing instruction (F137 / F138), it turns to ON
after a set time. If the execution condition turns to OFF, the flag is
OFF.
When using COM0 port, if it detects a communication error, it is
ON.
When performing constant scanning, if the scan time exceeds the
value of the set timer (system register No. 34), it is ON.
In the system register No. 34, it also turns to ON when 0 is set.
26.6 Table of Special Internal Relays
Description
26-65
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