How To Connect The ICP DAS Power Meter – PM-2133 and PM-2134 By The

ISaGRAF PAC ?

By chun@icpdas.com

The ISaGRAF PAC supports the Modbus RTU Master protocol to connect the ICP DAS power meter - PM-

2133 series and PM-2134 series. Please use RS-485 ports to connect the PM-213x power meters. One

ISaGRAF PAC can use one RS-485 port to connect some PM-213x power meters (Recommend connecting

no more than 30 power meters for one RS-485 port. For connecting many power meters, user may divide

them to be connectted by two or more RS-485 ports to make the scan time of those power meters shorter).

Please must follow the correct ways and safety rules listed in the user's manual of the PM-213x series power

meter to install it . User can refer to http://www.icpdas.com/products/intelligence/pm-213x.htm for more

information or email question to service@icpdas.com

FAQ-129 ICP DAS 1

The default NET-ID (address) setting of the PM-213x series is 1. The default communication parameter of

the Modbus RTU port of the PM-213x series is “19200, 8, None, 1”. Please apply the correct setting when

connecting them (It may be modified by users).

How to program ? First connecting the “Mbus” in the ISaGRAF I/O connection window. You may refer to

the Chapter 8 of the ISaGRAF User's manual for more information about the Modbus RTU / ASCII Master

functions (http://www.icpdas.com/products/PAC/i-8000/getting_started_manual.htm ) or refer to the FAQ-

047 , FAQ-096 or FAQ-101 ( http://www.icpdas.com/faq/isagraf.htm )

The “port_no” setting of the following figure means the COM port number is 3 (5003 mod 100 = 3) and the

“Delay time for sending one Modbus request” is 50 ms (5003/100 = 50), that is 0.05 seconds.Some Modbus

RTU slave device can not accept frequent polling, then set bigger “Delay-time” value for those devices.

Recommend to set the “Delay-Time” larger than 30 ms for connecting the PM-213x series power meter.