1 FUNCTIONS
1.4 Diagnostic Function
49
1
Short-circuit detection function
This function detects an overcurrent of outputs and limits the output current.
When the output current is 20ms or higher, or 0.5A/point or higher, a short circuit is detected.
Operation of when an error is detected
When a short circuit occurs on the output terminal for which "Output short-circuit detection setting" is set to "To detect",
'Output short-circuit detection status' is set to 1 (Short circuit detected).
When the output module with diagnostic functions detects a short circuit, an alarm (Output short-circuit detection) occurs.
The output terminal with a short circuit stops the output.
The alarm status due to an output short-circuit detection can be checked in the module diagnostics window of the engineering
tool.
When a short circuit is detected, the ALM LED turns on.
Operation of when the connection is recovered from a short circuit
The operation of when the cause of a short circuit is eliminated and the connection with the external device is recovered
differs depending on the setting in "Short Circuit Auto Clear enable/disable".
■
When "Short Circuit Auto Clear enable/disable" is set to "Disable"
The following shows the operation of when 'Alarm clear request' (Y11) is turned on and off.
• The value of 'Output short-circuit detection status' (Un\G3088) changes from 1 (Short circuit detected) to 0 (Normal).
• 'Alarm flag' (X11) turns off.
• The ALM LED turns off.
: Performed by the output module with diagnostic functions.
: Performed by a program.
GX Works3
A short circuit
was detected on
a valve!
A problem has
occurred on C!
Valve C
Valve D
Short circuit
or ground fault
ON
0
1
0
OFF
ON
OFF
ALM LED
Short-circuit status
Normal
Short circuit
Normal
Off
On
Off
'Output short-circuit
detection status' (Un\G3088)
'Alarm flag'
(X11)
'Alarm clear request'
(Y11)
Содержание MELSEC iQ-RX40NC6B
Страница 1: ...MELSEC iQ R I O Module With Diagnostic Functions User s Manual Application RX40NC6B RY40PT5B ...
Страница 2: ......
Страница 125: ...4 OVERVIEW 123 4 MEMO ...
Страница 191: ...12 MAINTENANCE AND INSPECTION 189 12 MEMO ...
Страница 227: ......