Omron FH series User Manual page 174

Setting item
Asynchro-
nous output
Retry interval [ms]
Retry interval 2 [ms]
Polling cycle [ms]
172
Communicating with PLC Link
Set value
[Factory default]
Selected:
• Selected.
• [Not selected.]
Not selected: Measurement processing and data output pro-
Reference:
Set the time after which a timeout error will occur due to failing
in establishing PLC link communications.
The error is caused by making incorrect communication settings
or disconnection of communication cables, and similar causes.
After a timeout error occurs, communications with the destina-
tion device will be attempted at the interval time that is set as
the retry interval.
Reference:
0 to 999999
*1:
[10000]
The command will be resent after the time that is set for "Retry
interval 2" in cases where PLC link communications fail due to
a temporary response delay caused by heavy network loads,
0 to 999999
processing conditions on a PLC, and similar causes. Set the
[1000]
time so that the time set for "Retry interval 2" is shorter than
the time set for "Retry interval". Normally the setting should not
be changed.
0 to 999999:
Set the interval at which the FH/FZ5 Sensor Controller checks
for the Command Execute (EXE) signal from an external
device, i.e., PLC, turning from OFF to ON.
−1:
−1 to 999999
If this value is set, polling will not be performed during normal
[0]
operation.
This setting prevents communications (polling) from affecting
the measurement processing time during normal operation.
Commands cannot be executed, but data output and flow con-
trol can be performed.
Description
Measurement processing and data output pro-
cessing are performed in parallel. The data out-
put processing does not affect the processing
time of the measurement flow.
IMPORTANT
Always set the output control to [Handshaking] for
asynchronous output. If you set the output control to
[None], operation will be fixed at the following values:
Output time: 100 ms, Output period: 200 ms.
If you need a shorter output time and output period when
the output control is set to [None], do not select
asynchronous output.
cessing are synchronized so that all data output
processing is finished when measurements are
finished. This increases the overall processing
time of the measurement flow.
Note
This is the same as the PLC Link operation of the FZ4
Vision Sensor.
Asynchronous Output (p.182)
Data Output Control with Handshaking (p.32)
If handshaking is enabled, a timeout error will also occur if
any of the following operations are not performed during the
[Retry interval].
• If the DSA signal is not turned ON after a certain time
elapses from when measurements are finished
• If the DSA signal is not turned OFF after a certain time
elapses from when the GATE signal turns ON
• If the DSA signal is not turned ON after a certain time
elapses from when the GATE signal turns OFF.
Vision System FH/FZ5 Series User's Manual
for Communications Settings (Z342)
*1