Emerson Network Router 用户手册
Installation and Use Manual
27
Installation and Setup
Pr
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Setup
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tup
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Begin
Table 2-13
MVD Direct Connect auto-detection limits
Parameter
Option
Protocol
Modbus RTU (8-bit)
Modbus ASCII (7-bit)
Modbus ASCII (7-bit)
Baud rate
Standard rates between 1200 and 38,400
Parity
Even, odd, none
Stop bits
1, 2
Table 2-14
Model 2400S service port auto-detection limits
Parameter
Option
Protocol
Modbus RTU (8-bit)
Modbus ASCII (7-bit)
Modbus ASCII (7-bit)
Address
Responds to both:
• Service port address (111)
• Configured Modbus address (default=1)
• Configured Modbus address (default=1)
Baud rate
Standard rates from 1200 to 38,400
Stop bits
1, 2
Parity
Even, odd, none
Table 2-15
Default communication parameters for Series 1000/2000/3000 transmitters
Default values
Transmitter
Physical layer
Protocol
Baud
Data
bits
bits
(1)
(1) ProLink II automatically sets data bits appropriately for the configured protocol. Even though a data bits parameter may be
configured in the transmitter, you do not need to configure it in ProLink II. HART protocol is always 8 data bits. If your transmitter
is configured for Modbus with 7 data bits, specify Modbus ASCII; if your transmitter is configured for Modbus with 8 data bits,
specify Modbus RTU.
is configured for Modbus with 7 data bits, specify Modbus ASCII; if your transmitter is configured for Modbus with 8 data bits,
specify Modbus RTU.
Stop
bits
bits
Parity
Address
Model 1500/2500
Bell 202
(2)(3)
(2) Connection to primary mA output, or to HART clips (Model 2400S transmitters only).
(3) Except Model 1500 transmitter with the Filling and Dosing application. The Model 1500 transmitter with the Filling and Dosing
(3) Except Model 1500 transmitter with the Filling and Dosing application. The Model 1500 transmitter with the Filling and Dosing
application does not support Bell 202 / HART communication.
HART
(4)
(4) HART/Bell 202 parameters are not configurable. The settings shown here are always in effect.
1200
8
1
odd
0
RS-485
(5)
(5) Connection to RS-485 terminals.
Modbus RTU
9600
8
1
odd
1
Model 1700/2700 AN
Bell 202
HART
1200
8
1
odd
0
RS-485
(6) Available only on Model 1700/2700 transmitters with analog outputs.
HART
1200
8
1
odd
0
Model 1700/2700 IS
Model 2700 CIO
Model 2700 CIO
Bell 202
HART
1200
8
1
odd
0
Model 2400S AN
Bell 202
HART
1200
8
1
odd
0
RS-485
Modbus
(RTU or ASCII)
(RTU or ASCII)
Auto-
detect
detect
Auto-
detect
detect
Auto-
detect
detect
Auto-
detect
detect
1
Series 3000
Bell 202
HART
1200
8
1
odd
0
RS-485
Modbus RTU
9600
8
1
odd
1