SATEC 1771DB - Manual (Page 4)

4
1 ABOUT THE COMMUNICATION DRIVER
•
The driver provides data exchange between the PLC-2, PLC-3 and PLC-5 programmable
controllers, and SATEC Powermeters via the 1771-DB BASIC module.
•
The EPROM firmware versions can be supplied for 1 to 31 instruments.
•
Two data sets are available upon order. For available data sets, refer to Appendix A.
•
Two additional options are available upon order. The first is communication error reporting to
the PLC processor (the option is refered to as the E option). The second is resetting
accumulated energies and demands in the connected Powermeters that can be made from the
PLC processor (this option is refered to as the R option).
•
The driver supports all the models of SATEC Powermeters, although some of parameters
might not be relevant to some of models, and in this case will be transmitted as zeroes.
•
The time required for polling one instrument and processing the acquired data until the data
transfer to the PLC processor occurs is 4 to 5 seconds depending on the model of the
instrument being polled.
•
The instruments are connected to the BASIC module peripheral port that can be used for RS-
422 or RS-232 communication. When using RS-232 interface, only one Powermeter may be
connected to the BASIC module. With RS-422 communications, up to 31 instruments can be
connected to the BASIC module in multidrop mode.
•
The peripheral port baud rate can be configured from 1200 to 9600 baud by setting a
configuration jumper in the BASIC module.