Emerson Micro-Motion 2400S, Configuration And Use Manual, Page: 22 / 198

14 Micro Motion
®
Model 2400S Transmitters with Analog Outputs
Connecting with ProLink II or Pocket ProLink Software
3.4 Connecting from a PC to a Model 2400S AN transmitter
Protocol options for ProLink II or Pocket ProLink connections to the Model 2400S AN transmitter are
listed in Table 3-1.
Note: Due to the design of HART protocol, connections made using HART protocol are slower than
connections that use Modbus protocol. If you use HART protocol, you cannot open more than one
ProLink II window at a time.
Note: If you connect using HART protocol, your actions may be restricted by the setting of the HART
security switch. See Section 2.6.
3.4.1 Service port connections
If you are connecting to the transmitter with ProLink II or Pocket ProLink, and you are making a
point-to-point connection, use the Service Port connection type. Service port connections are
preconfigured in these two communications tools. Follow the instructions provided in
Making the
connection .
If you are connecting with a different communications tool, ensure that your communications tool is
configured to use communications parameters within the auto-detection limits described in Table 3-2.
The service port always responds to all the listed protocols, communications parameters, and
addresses. Then follow the instructions provided in
Making the connection .
Auto-detection
To minimize configuration requirements, the service port uses an auto-detection scheme when
responding to connection requests. The service port will accept all connection requests within the
limits described in Table 3-2.
See Section 8.11.1 for information on configuring the HART address and the Modbus address.
Table 3-1 Protocol options for Model 2400S AN transmitters
Connection Physical layer Protocol
Service port (see Section 3.4.1) RS-485 Modbus RTU
Modbus ASCII
HART clips, mA output (Channel A), or HART multidrop network
(see Section 3.4.2) Bell 202 HART
Table 3-2 Service port auto-detection limits
Parameter Option
Protocol Modbus ASCII or Modbus RTU
(1)
(1) Service port support for Modbus ASCII may be disabled. See Section 8.11.1.
Address Responds to both:
• Service port address (111)
• Configured Modbus address (default=1)
Baud rate Standard rates between 1200 and 38,400
Stop bits 0, 1
Parity Even, odd, none