Carrier RTU-MP, Руководство по интеграции

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RTU-MP Controller 7
The following example shows the DIP Switches set for 38.4k, and MS/TP.
6
Connect the MS/TP network to the RTU-MP's J19 port. Connect to Net+ , Net- , and SHLD .
Wire specifications
○
A dedicated 22 AWG to 18 AWG twisted pair wire (EIA 485)
○
2000 feet (610 meters) for 76.8 kbps
○
Devices should be daisy chained and not star wired
○ Attach a shield at the beginning or end of the network segment and not at every controller
NOTE Use the same polarity throughout the network segment.
7
Turn on the RTU-MP's power.
Configuring the RTU-MP for Modbus RTU
Refer to Appendix C of this document for the Modbus Protocol Implementation Conformance Statement
(PICS).
1
Turn off the RTU-MP's power.
NOTE Changes made to the switches when the RTU-MP is on will not take effect until the RTU-MP has
been power cycled!
2
Using the rotary switches, set a unique Modbus slave address for the RTU-MP. Set the MSB ( SW1 ) switch
to the tens digit of the address, and set the LSB ( SW2 ) switch to the ones digit. Valid Modbus slave
addresses are 01-99.
EXAMPLE To set the RTU-MP’s Modbus slave address to 01, point the arrow on the MSB ( SW1 ) switch to
0 and the arrow on the LSB ( SW2 ) switch to 1.