IM 1E10C1-E
7-1
7. OPERATION VIA HART COMMUNICATOR
7.
OPERATION VIA HART COMMUNI-
CATOR
Matching of communicator DD and instrument DD
Before using model 275 HART communicator, check that the DD(Device Description)
installed in the communicator matches to that of instruments to set up. To check the DD
in the instrument or the HART communicator, follow the steps below. If the correct DD
is not installed in the communicator, you must upgrade the DD at the HART official
programming sites. For communication tools other than Model 275 HART communica-
tor, contact vendors of each for upgrade information.
1. Checking the DD in the instrument
1) Connect the communicator to the instrument to set up.
2) Call “Device setup” and press [
→
].
3) Call “Review” and press [
→
].
4) By pressing [NEXT] or [PREV], find “Fld dev rev” to
show the DD of the instrument.
2. Checking the DD in Model 275 HART communicator.
1) Turn on the communicator alone.
2) Call “Utility” from main menu and press [
→
].
3) Call “Simulation” and press [
→
].
4) Select “YOKOGAWA” from manufacturers list by
pressing [
↓
] and press [
→
] .
5) Select the model name of the instrument (i.e. ADMAG
SE) by pressing [
↓
] and press [
→
] to show the DD of the communicator.
7.1 Conditions of Communication Line
7.1.1
Interconnection between ADMAG SE and HART Communicator
The HART Communicator can interface with the ADMAG SE from the control room,
the ADMAG SE site, or any other wiring termination point in the loop, provided there is
a minimum load resistance of 230
Ω
between the connection and the receiving instru-
ment. To communicate, it must be connected in parallel with the ADMAG SE, the
connections are non-polarized. Figure 7.1.1 illustrates the wiring connections for direct
interface at the ADMAG SE site. The HART Communicator can be used for remote
access from any terminal strip as well.
ADMAG SE
+
–
4 to 20 mA DC signal line
Control room
Terminal board
Receiving instrument
load resistance:
230
Ω
to 600
Ω
Relaying
terminals
HART
Communicator
Model 275
HART
Communicator
Model 275
HART
Communicator
Model 275
CUR+
CUR-
Figure 7.1.1 Interconnection Diagram
ADMAG SE
Review
Fld dev rev
2
HELP
PREV
NEXT
EXIT
[Example]
“The instrument DD is Version 2”
HART Communicator
Fld dev rev
1 Dev v1 , DD v2
2 Dev v2 , DD v1
Version
1 and 2
[Example]
“The communicator DD
supports Version 1 and 2.”
CAUTION