Omron SYSMAC FH Series User Manual page 206

2 Methods for Connecting and Communicating with External Devices
Retry interval [ms]
Retry Interval 2 [ms]
Polling Cycle [ms]
*1. In the communications using Handshaking, a timeout error will also occur if any of the following op-
erations were not performed within the time set this Retry interval as well..
•
If the DSA signal were not turned ON even after a certain time passed from when measurement
has been completed.
•
If the DSA signal did not switch from ON to OFF even after a certain time passed from when the
GATE signal has switched from OFF to ON.
•
If the DSA signal did not switch from OFF to ON even after a certain time passed from when the
GATE signal has switched from ON to OFF.
*2:
Precautions for Correct Use
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, un-
check the asynchronous output option.
2 - 144
Setting item
[Factory default]
0 to 999999
[10000]
0 to 999999
[10000]
-1 to 999999
[0]
FH/FHV Series Vision System User's manual for Communication Settings (Z342-E1)
Setting value
Set the time until when a timeout error will
occur because the PLC Link communications
are not established with incorrect communi-
cation settings or communication cables bro-
*1
ken.
After a timeout error occurred, communica-
tions with the destination device will be at-
tempted with the interval time set in the Retry
interval.
For details, refer to Data Output Control with
Handshaking on page 1 - 25.
When the PLC Link communications fail due
to a temporary response delay affected by
heavy network loads and the PLC internal
status, the command will be re-transmitted to
the destination device after the time set in
the Retry Interval 2 passed.
Set the shorter time in the Retry Interval 2
than that in the Retry Interval.
Normally use the default values.
-1:
When this value is set, polling will not be per-
formed in normal operation. This setting
eliminates influence to measurement proc-
essing time due to communications (polling)
in normal operation. Although commands will
not be performed, data output and flow con-
trol can be performed.
0 to 999999:
Set the interval at which the Sensor Control-
ler of the FH/FHV series checks that the
Command Execute (EXE) signal from an ex-
ternal device such as PLC, switches from
OFF to ON.
Description