Yokogawa FieldMate - Manual (Page 259)

<I ISA100 device configuration>
I-5
IM 01R01A01-01E 9th Edition : May 31, 2013-00
I020302E.ai
Figure I-2-4 Advanced Setting
 Number of communication devices
Sets the maximum number of ISA100 devices to simultaneously communicate with.
Setting value: 1, 5, 10 (default), 20, 50
 Communication time out
Sets the maximum time to wait for communication response
When the set time elapses without any response, communication with devices is terminated.
Setting value: 30 sec, 60 sec (default), 120 sec, 240 sec
 Cache function
When this function is checked and the gateway to be communicated with has any values in
cache, FieldMate does not start to communicate with devices and displays the cached values on
Segment Viewer.
The cache function is provided in the YFGW410 gateway but not in the YFGW710.
Therefore, even if this function is checked, it is not enabled during communication with the
YFGW710.
Table I-2-1 shows the parameters corresponding to each cache and the timing of caching.
Table I-2-1 Cache Function
Model information Device status
Corresponding
parameter
Vendor
Model
Device Revision
Status Display
Timing of caching
When an ISA100 device is joined to
the gateway and the configuration is
completed
At every time set in Read Parameters for
each device
Setting value default : OFF