Yokogawa YFGW710 - Manual (Page 113)

<B2. System Maintenance>
B2-2
IM 01W01F01-01EN
B2.2 Troubleshooting and Recovery Task
This section describes the troubleshooting and recovery procedure for the process alarms and
system alarms that are displayed in the control system and the device alarms that are displayed
in PRM.
Field Wireless Management Tool is used for the troubleshooting.
Process alarm generation
FWMT: Field Wireless Management Tool
GW: YFGW710
BBR : Backbone Router
SM : System Manager
Can GW
be accessed
from FWMT?
Is the
system alarm of
the device occurring
simultaneously?
Is the
remaining battery
power of the device
enough?
Is the
system alarm
indicating
a GW failure occurring
simultaneously?
Is
system alarm
occurring for
all devices existing on the
same network
simultaneously?
Can GW be
accessed
from FWMT?
Is one
or more
devices
joining the field
wireless network
displayed in FWMT?
(With exception of
GW/BBR/SM)
Field wireless network
conditions
are considered to be unstable.
Consult with Yokogawa
There is the possibility of
a routing error
between the control
system and GW.
Check the route for
broken wire, HUB failure,
etc.
There is the possibility of
a routing error between
FWMT and GW. Check
the route for broken wire,
HUB failure, etc.
There is the possibility of
a gateway failure.
Replace the gateway.
There is the possibility of
a gateway failure.
Replace the gateway.
Device failure. Contact
the device vendor.
Replace the batteries.
Process error. Check
the upper and lower
limit of the process
data, etc.
YES
NO
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
Note 1
Note 2
Note 4 Note 3
Note 5
Note 6
FB0201.ai
Figure B2-1 Troubleshooting and Recovery Procedure