8
PROGRAMMING
8.3 Using Link Special Relay (SB) and Link Special Register (SW)
8
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(3) Checking transient transmission errors
Transient transmission errors are checked through the CC IE Control Network
Diagnostics, but they also can be checked with link special relay (SB) and link special
register (SW). (
Section 10.3 CC IE Control Network Diagnostics)
(a) Checking stations where transient transmission errors have occurred
1) When a transient transmission error occurs, Transient error of each station
(SB0170) is turned ON.
2) The station where a transient transmission error has occurred can be checked
in Transient error detection status of each station (SB0170 to SB0177).
3) When Clear transient transmission errors (SB000A) is turned ON, Transient
error detection status of each station (SW0170 to SW0177) can be cleared.
(b) Checking the number of transient transmission errors
1) When a transient transmission error occurs, Transient error (SB008F) is turned
ON.
2) The number of transient transmission errors is stored in Number of transient
transmission errors (SW006F).
3) When Clear transient transmission errors (SB000A) is turned ON, Number of
transient transmission errors (SW006F) can be cleared.
(c) Clearing Transient transmission error log
By setting Clear transient transmission errors (SB000A) to ON, the transient
transmission error log (Un\G2592 to 2753) can be cleared.
Remark
The contents of transient errors can be checked with either of the following.
• CC IE Control Network Diagnostics (
• Completion status in control data of dedicated instruction
(
CHAPTER 9 DEDICATED INSTRUCTIONS)
Table 8.15 SB/SW used in checking station where a transient transmission error has occurred
No.
Description
No.
Description
SB000A
Clear transient transmission errors
—
SB0170
Transient error of each station
SW0170 to
SW0177
Transient error detection status of each station
Table 8.16 SB/SW used in checking the number of transient transmission errors
No.
Description
No.
Description
SB000A
Clear transient transmission errors
—
SB008F
Transient errors
SW006F
Number of transient transmission errors
Summary of Contents for QJ71GP21-SX
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