Yokogawa FieldMate - Manual (Page 81)

<9 COMMUNICATION ERROR>
9-3
IM 01R01A11-01EN
9.2 Device Address Setting
WARNING
This operation must be carried out by the trained personnel having knowledge of multidrop loop.
For the details of the parameter setting procedure, refer to IM 01E20C01-01E or IM 01E20C02-
01E. After using Verification Tool, set the AXF to the original multidrop loop.
9.2.1 Multidrop Mode Canceling
F090201-A.ai
USB FieldMate Modem
Device A
Device Address: 1
Device B
Device Address: 2
Device C
Device Address: 3
Device X
Device Address: 15
Load: 250 Ω
+
-
+
-
+
-
+
-
USB FieldMate Modem
Device A
Device Address: 1
Load: 250 Ω
Load:
250 Ω
Multidrop Loop side
+
-
Set to “0”.
F090201-B.ai
(A) Multidrop loop (B) After canceling Multidrop loop
Figure 9.2.1 Configuration
1) Disconnect the target device (AXF) from the multidrop loop physically.
2) Connect the AXF to FieldMate one to one. A load of 250Ω is required. See
Figure 9.2.1 (B).
3) Record the following original AXF parameter, and then set the parameter as shown.
Table 9.2.1 Parameter of Cancelling Multidrop mode
HART Parameter (DTM) Setting Value
Poll Addr Configuration → HART → Poll addr 0
4) Start Verification Tool.
9.2.2 Multidrop Mode Setting
After using Verification Tool, set the AXF back to its original status.
1) After Verification Tool termination, set the AXF parameter back to its original value manually.
Table 9.2.2 Parameter Setting of Multidrop mode
HART Parameter (DTM) Setting Value
Poll Addr Configuration → HART → Poll addr Original Value
2) Connect the AXF back to the original configuration.