Instruction manual

Analog Panel Meter Instruction Manual
74
Modbus RTU Serial Communications (serial)
The meter is equipped with serial communications capability as a
standard feature using Modbus RTU Serial Communication Protocol.
To communicate with a computer or other data terminal equipment, an
RS-232 or RS-485 option is required; see Ordering Information on
page 7 for details.
Warning!
Do not connect any equipment other than Dwyer
Instruments, Inc.’s expansion modules, cables, or
meters to the RJ45 M-LINK connector. Otherwise
damage will occur to the equipment and the meter.
Note: More detailed instructions are provided with each optional serial
communications adapter.
Note: Refer to the Modbus
Register Tables located at www.dwyer-
inst.com for details.
When using more than one meter in a multi-drop mode, each meter must
be provided with its own unique address. The meter address (Slave ID)
may be programmed between 1 and 247. The transmit delay may be set
between 0 and 199 ms. The parity can be set to even, odd, or none with
1 or 2 stop bits.
The APM can also be connected to another APM with a special PMA-02
cable, allowing the user to copy all the settings from one meter to
another, using the Copy function.