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Emerson Series 3000 MVD User Manual

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Configuration and Use Manual
99
Configuring Digital Communications
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Figure 13-3
Digital communication menu – Bell 202 and Device setup
13.3
Configuring RS-485 parameters
RS-485 parameters specify how the Series 3000 device will communicate via the RS-485 terminals. 
(To set up RS-485 communications, see Section 3.3.) 
The RS-485 terminals can be configured for HART, Modbus RTU, Modbus ASCII protocol, or printer 
protocol. Different protocol parameters are displayed according to your choice of protocol.
13.3.1
Configuring HART, Modbus RTU, or Modbus ASCII protocol
Parameters used to configure HART, Modbus RTU, and Modbus ASCII protocols are listed and 
defined in Table 13-1.
Note: If HART is configured, the Polling Address is used for both HART/RS-485 and HART/Bell 202 
communications (see the following section). All other parameters specified here apply only to 
HART/RS-485 communications (via the RS-485 terminals). They do not apply to HART/Bell 202 
communications (via the primary mA output terminals).
Digital comm
Configure Bell-202
Device setup
Polling address
(1)
Loop current mode
• Enable
• Disable
Burst mode
• Enable
• Disable
Burst command
• Primary variable
• PV & pct range
• Dyn vars & pct range
• Transmitter vars
Burst variable 1
(2)
Burst variable 2
(2)
Burst variable 3
(2)
Burst variable 4
(2)
Fault setting
• Upscale
• Downscale
• Zero
• NAN
• Zero flow
• None
Description
User message
HART QV
HART device ID
Transmitter serial no.
(1) If HART protocol is configured for RS-485, Polling Address in RS-485 menu and Polling Address in Bell 202 menu are 
duplicates. See Section 13.3.1.
(2) Displayed only if Burst Command is set to Transmitter Vars.