Emerson 5300, 5400 External Hart Devices Slaves, No. of devices Approx. update rate Slaves

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Manual Supplement

00809-0500-4530, Rev AA October 2010

Rosemount 5300/5400 Series

External HART Devices (Slaves)

The HMC supports up to four external HART devices. The external devices are separated by using the HART address. The address must be different between the external devices and only addresses 1 to 5 are allowed for multiple slaves. Connect the devices one at a time and change the short address prior to connecting the next device by using a HART Configuration Tool such as RRM, or a Field Communicator.

NOTE

The power supply from the HMC to external HART devices is not intrinsically safe. In a hazardous environment, any external HART device connected to the HMC must have Flameproof/Explosion-proof certification.

The HMC cyclically polls the HART devices for measurement values. The update rate depends on the number of connected devices and is shown in Table 1-2.

Table 1-2. Approximate update rates for measurement values

No. of devices

Approx. update rate

(slaves)

 

1

2 seconds

2

3 seconds

3

4 seconds

4

5 seconds

5

5 seconds

Figure 1-7. The HMC Module supports up to four external devices (slaves)

RS-485

Bus

Power Supply

Up to four external devices

HART to Modbus Converter

MB

MODBUS MA

(RS-485) -

- POWER +

 

HART Ambients > 60 ºC

+

Use wiring rated

for min 90 ºC

External HART

 

External HART

device 2

 

device 1

 

 

 

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Contents Manual Supplement Rosemount 5300/5400 Series with Hart to Modbus ConverterExplosions could result in death or serious injury Safety MessagesWorkflow IntroductionMechanical Installation Electrical Installation Field Wiring Connections Hart + RS-485 Bus Installation casesAlternative Multidrop Connection of 5300/5400 Transmitters Star TopologyExternal Hart Devices Slaves No. of devices Approx. update rate SlavesConnect to the MA/MB terminals Establish Hart CommunicationRosemount 5300/5400 Series Connect to the Hart terminals Transmitter Configuration Using RRM to change communication parameters Modbus Communication Protocol ConfigurationModbus Setup Modbus RTU Parameter Configuration Example Levelmaster Communication Setup HMC A44 B4800 PO S2HMC A127 HMC M2 A2 B9600 D7 PN S1 Levelmaster Parameter Configuration ExampleImplemented Functions of Levelmaster Protocol HMC M1 A246 B9600 D7 PN S1 Modbus Ascii Communication SetupRosemount 5300/5400 Series Alarm Handling Modbus RTU LevelmasterModbus Ascii Rosemount 5300/5400 Series Input Registers Common Modbus Host ConfigurationBit information in bitfield 14. Output Variables for Floating Point Format Code Rosemount 5300/5400 Series Measurement Units Volume LengthEmerson Process Management ROC800 Series Specific Modbus Host ConfigurationABB TotalFlow Emerson Process Management FloBossBristol ControlWave Micro Thermo Electron AutopilotKimray Dacc 2000/3000 ScadaPackNo 5300/5400 communication in RRM Troubleshooting No communication on RS-485 bus MA, MBNo communication with Modbus RTU protocol No communication with Modbus Ascii protocolSelect Enable Modbus Communication and click OK HMC Firmware Upgrade in Rosemount Radar MasterRosemount 5300/5400 Series Click Browse Checksum Rosemount 5300/5400 Series Specifications Rosemount 5300/5400 Series Emerson Process Management Rosemount Measurement