Hitachi WJ C1 Series

Chapter 14 Safety Function STO
14-1-5
Input status
①
②
③
④
⑤
[ST1]
Close
Open
Close
Open
Open or Close
[ST2]
Close
Close
Open
Open
Open or Close
Failure
detection
None
Detected
[b145]
00
-
-
-
-
E99
01
-
E37
E37
E37
E99
02
-
E98
E98
-S--
E99
03
-
-
-
-S--
E99
04
-
-
-
-S--
E99
05
-
-F01 or -F20
-F02 or -F10
-S--
E99
06
-
-F01 or -F20
-F02 or -F10
-S--
E99
Definition of event
Event
Description
e1
Input status becomes ①
e2
Input status becomes ② or ③
e3
Input status becomes ⑤
e4
Input status becomes ④
e5
Input status is held more than the time set in "STO release
delay allowed time [b146]".
This event does not exist except for [b145] = 05.
■ State transition diagram (b145:00)
Normal
operation
STO
[Display]
No status
indication
Internal failure
[Display]
[E99]
e3
e3
e1
e4
STO
[Display]
No status
indication
e3
e1
e2
e2
e4