Error And Troubleshooting - Hitachi SJ Series Safety Function Manual

Chapter 9
Chapter 9 Error and
9.1 Contents in this chapter
This chapter describes the error related to the STO function
and the troubleshooting
9.2 Error
An error is generated when the internal diagnosis function
detects a failure in the internal safety paths or when
configured by related parameters. Please refer to the
sections below for the error contents and their
troubleshooting.
9.2.1
[E090] STO shut off error
In case of the parameter [bd-01] is set to "02", the error
[E090] is generated when both of the STO inputs becomes
OFF (STO).
What to do
 If this error is not released even after releasing STO
inputs to SJ-P1 and then cycling power, please check
wirings and signals of the STO inputs.
 If this error is generated in an unintentional condition,
please perform the functional test of the STO function
of SJ-P1 to check proper functionality of the STO
function.
 If the generation of this error is not desired in the
system, it can be disabled by setting [bd-01] to other
than "02".
Troubleshooting
9.2.2
The error [E091] is generated when a fault in the internal
safety paths has been detected.
After generation of this error, the internal safety paths are
held on STO state until powered down.
What to do
 When this error is generated, it is likely that a fault
exists in the internal safety paths of the SJ-P1.
 Please ensure to stop the operation of the system and
shut off the power supply, and then conduct the
functional test.
9.2.3
The error [E092] and [E093] may be generated when [bd-
04] is set to other than "0.00" and [bd-04] to "02".
This error is generated when inconsistent input state of ST1
and ST2 continues for the time specified by the parameter
[bd-02].
Refer to Chapter 4 for the details of the conditions
generating [E092] and [E093].
What to do
 Check the wiring and signal on STO input.
 Set the parameter [bd-02] suitable for the system.
When adjusting the time, please ensure the specified
time is appropriate for the system.
 If this error is not desired, it can be disabled by setting
the parameter [bd-04] to other than "02".
9-1

Error and Troubleshooting

[E091] STO internal error
[E092]/[E093] STO path 1/2 error
9