Mitsubishi Electric Melsec QJ71LP21 Reference Manual page 211

6 PROGRAMMING
No.
SB000A Clear transient transmission errors
SB000B Transient transmission error area setting
SB00EE Transient error
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(3) Checking transient transmission errors
Transient transmission errors are checked through the GX Developer network
diagnostics, but they also can be checked with link special relays (SB) and link
special registers (SW). (Refer to Section 8.1.4)
1) When a transient transmission error occurs, Transient error
(SB00EE) is turned ON.
2) An error code is stored in Transient transmission error history
(SW00F0 to SW00FF).
3) The number of transient transmission errors is stored in Transient
transmission error (SW00EE).
4) An exact error code storage area in Transient transmission error
history (SW00F0 to SW00FF) is stored in Transient transmission error
pointer (SW00EF).
5) If Transient transmission error area setting (SB000B) is turned ON,
the error code stored in Transient transmission error history (SW00F0
to SW00FF) is retained. (Not overwritten even if another error occurs.)
6) Turning ON Clear transient transmission errors (SB000A) will clear the
following areas:
• Transient transmission error (SW00EE)
• Transient transmission error pointer (SW00EF)
Description No.
SW00EE Transient transmission error
SW00EF Transient transmission error pointer
SW00F0 to
Transient transmission error history
SW00FF
MELSEC-Q
Description
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