Rosemount™ 2410 Tank Hub
GPE emulation instruction
Manual Supplement
00809-0700-2410, Rev AB
September 2021
2
Manual Supplement Contents
00809-0700-2410 September 2021
Contents
Chapter 1 Introduction.............................................................................................................. 5
1.1 Emulation capabilities..................................................................................................................6
1.2 GPE system characteristics...........................................................................................................7
1.3 Rosemount 2410 Tank Hub communication................................................................................9
Chapter 2 Electrical installation................................................................................................13
2.1 Rosemount 2410 Tank Hub connections................................................................................... 13
Chapter 3 Configuration...........................................................................................................15
3.1 Set up Modbus communication protocol...................................................................................15
3.2 Install Rosemount 2410 Tank Hub in WinSetup......................................................................... 16
3.3 Configure specific variables for emulation................................................................................. 18
3.4 Verify GPE communication parameters......................................................................................21
3.5 Configure field devices...............................................................................................................23
3.6 Start GPE emulation...................................................................................................................23
Chapter 4 Troubleshooting...................................................................................................... 25
4.1 Communication status.............................................................................................................. 25
4.2 Digital current loop modem.......................................................................................................26
Chapter 5 Optional configuration and settings......................................................................... 27
5.1 Engineering units.......................................................................................................................27
5.2 Loop number selection.............................................................................................................. 27
5.3 Miscellaneous control register................................................................................................... 30
5.4 Advanced communication settings............................................................................................32
Emerson.com/Rosemount 3
Contents Manual Supplement
September 2021 00809-0700-2410
4 Emerson.com/Rosemount
A
B
C
EF
D
D
Manual Supplement Introduction
00809-0700-2410 September 2021
1 Introduction
The purpose of this document is to provide guidelines on how to change from other
manufacturer’s devices to Rosemount equipment by exchanging gauges. When a gauge is
replaced with a Rosemount gauge, it is necessary to configure the Rosemount 2410 Tank
Hub for emulation.
The Rosemount field devices, for example Rosemount 5900 Radar Level Gauge and
Rosemount 2240S Temperature Transmitter, are connected to the tank hub using the
intrinsically safe Tankbus as usual. Emulation is done in the tank hub only. Each tank hub
can emulate up to 10 tanks (10 separate gauges)
Figure 1-1: Rosemount Devices Replacing Old Gauges in an Existing GPE System
(1)
.
A. Existing GPE host
B. Existing data polling unit
C. Rosemount 2410 Tank Hub
D. GPE gauges
E. Rosemount 5900S Radar Level Gauge
F. Rosemount 2240S Temperature Transmitter with sensor
(1) Tank hub version “Multiple tanks” can emulate up to 10 tanks (10 gauges). Tank hub version “Single tank” can emulate up
to 2 tanks (2 gauges).
Emerson.com/Rosemount 5
Introduction Manual Supplement
September 2021 00809-0700-2410
1.1 Emulation capabilities
Emulation enables the replacement of old devices with Rosemount devices in another
vendor’s existing tank gauging system. The Rosemount device will perform just like the
replaced gauge, using the other vendor’s protocol to communicate.
By using the other vendor’s field and control room communication protocol with modern
Rosemount tank gauging devices, the legacy system can be modernized step-by-step. The
legacy system can be upgraded while tanks are in operation and existing wiring can be reused.
The tank hub can emulate replaced devices, acting as either slave or master. The tank hub
slave emulation is described in this document.
Tank hub acting as slave
When an old gauge from another vendor is replaced with a tank hub connected to a
Rosemount field device, the tank hub will act as a slave answering requests and sending
data upwards towards the host.
A stepwise “bottom-up” upgrade is done by replacing legacy gauges to begin with, and
changing the complete control system at a later occasion.
Figure 1-2: Tank Hub Slave Emulation
6 Emerson.com/Rosemount
Manual Supplement Introduction
00809-0700-2410 September 2021
1.2 GPE system characteristics
The tank hub can emulate up to 10 tank positions
• Level
• Average liquid temperature
• Analog input
(3)
Gauge types
The tank hub can emulate two different GPE transmitters, 31422 and 31423. There is also
support for two special Rosemount proprietary gauge types. See all available gauge types
described in Table 1-1.
The selected gauge type applies to all tank positions for the tank hub.
Table 1-1: Gauge Types
Gauge types Description
31422 GPE gauge type supplying level and temperature data. Relay K1/
alarm contact status can be mapped to the most significant level
character, see Table 5-1 for further information.
(2)
, each supporting:
31423 GPE gauge type supplying level and temperature data. Analog
input is also supported. Relay K1/alarm contact status can be
mapped to the most significant level character, see Table 5-1 for
further information.
RTG High Resolution Rosemount proprietary gauge type with higher resolution for
level and temperature data. Relay K1/alarm contact status is also
supported.
High Res Temp Rosemount proprietary gauge type that delivers the average
temperature in 1/10 Fahrenheit. The rest of the response is
identical as for the 31423 gauge type.
Protocol and electrical interface
Table 1-2: Protocol and Electrical Interface
Protocol Electrical interface
GPE RS485
20 mA current loop
(2) Tank hub version "Multiple tanks" can emulate up to 10 tanks (10 gauges), tank hub version "Single tank" can emulate up
to 2 tanks (2 gauges).
(3) Requires tank hub equipped with analog input option.
Emerson.com/Rosemount 7
A
B
A
Introduction Manual Supplement
September 2021 00809-0700-2410
Figure 1-3: GPE Connection: Digital Current Loop - Devices Connected in Series
A. GPE master
B. 0-20 mA
Figure 1-4: GPE Connection: RS485 - Devices Connected in Parallel
A. GPE master
GPE protocol description
The GPE protocol is based on an request/reply schedule.
The request is normally 3 bytes and contains the address of the gauge and what data is
requested. Depending on how the address is represented, different data is requested, with
or without analog input information.
The reply, 10-14 bytes, contains; level, average temperature, and if requested also analog
input value.
8 Emerson.com/Rosemount
A B
C
D
E
F
Manual Supplement Introduction
00809-0700-2410 September 2021
1.3 Rosemount 2410 Tank Hub communication
The tank hub has slots for two independent communication boards, primary and
secondary field bus, for TRL2 Modbus®, RS485 Modbus, emulation, or wireless
communication.
Support for GPE emulation is selected in the model code, refer to Rosemount 2410
Product Data Sheet for more information. There are three alternatives available for GPE
emulation:
• Example 1: RS485 Modbus on primary bus
RS485 is available on the primary bus, preferably combined with TRL2 on the
secondary bus.
• Example 2: Digital current loop on secondary bus
GPE (digital current loop) is available on the secondary bus, where the primary bus can
be used for regular TRL2 or RS485 communication.
• Example 3: Wireless communication in combination with GPE emulation
RS485 or GPE (digital current loop) is available on the primary bus, where the
secondary bus is used for WirelessHART® for normal communication.
Example 1: RS485 Modbus on primary bus
When the RS485 protocol is used for GPE emulation, the primary field bus is connected to
the GPE host. The secondary field bus can be used to configure the tank hub for emulation,
using a TRL2 modem like the Rosemount 2180 Field Bus Modem (FBM), see Figure 1-5.
Figure 1-5: Emulation on Primary Bus and Configuration on Secondary Bus
A. Primary bus: RS485 Modbus
B. Secondary bus: TRL2 Modbus
C. RS485 converter
D. GPE host
E. FBM
F. Rosemount TankMaster™ PC
Emerson.com/Rosemount 9
A
B
C
B
D
Introduction Manual Supplement
September 2021 00809-0700-2410
It is possible to use the RS485 protocol for both emulation and configuration
(4)
. In that
case, the primary bus is first used for configuration and thereafter switched to the GPE
host in order to start emulation, as shown in Figure 1-6.
Figure 1-6: Emulation and Configuration on Primary Bus
A. Primary bus: RS485 Modbus
B. RS485 converter
C. Rosemount TankMaster™ PC
D. GPE host
(4) When using the RS485 protocol for configuring, different communication parameters must be used. See Table 3-1.
10 Emerson.com/Rosemount
A B
C
D
E
F
Manual Supplement Introduction
00809-0700-2410 September 2021
Example 2: Digital current loop on secondary bus
The digital current loop interface is connected to the Rosemount 2410 secondary field
bus.
Configuration is usually performed with a FBM connected to the primary bus. The primary
bus can be used for regular TRL2 or RS485 Modbus communication.
Figure 1-7: Configuration on Primary Bus and Emulation on Secondary Bus
A. Primary bus: TRL2 Modbus
B. Secondary bus: Digital current loop
C. FBM
D. Rosemount TankMaster™ PC
E. DCL modem
F. GPE host
Emerson.com/Rosemount 11
Loading...