Schneider Electric manual BM85 With Typical RS232/485 Devices

initiating or responding to Modbus Plus messages as needed for higher-level status reporting and control￿ Library functions are provided in the ￿M85 development software for creating multiple tasks within the ￿M85's application program, and for assigning and arbitrating the tasks￿

NOTE 2

MODBUS PLUS

BM85

BRIDGE

MULTIPLEXER

1 2 3 4

CONTROLLER

DISPLAY

NOTE 1

BARCODE READER

SCALE

MODBUS

DEVICE

NOTE 3

Figure 2 BM85 With Typical RS232/485 Devices

Figure 2 summarizes the typical layout of devices at the serial ports￿

Notes

1￿ RS232 or RS485 compatible devices are required for the respective ￿M85 models￿ RS232 and RS485 devices cannot be mixed on the same ￿M85￿

2￿ Incoming,/,outgoing access to devices in the application is defined by the ￿M85's internal code, programmed by the user and downloaded to the ￿M85 across Modbus Plus￿

3￿ Modbus master or slave devices can be used if the user-defined code includes a Modbus protocol handler￿

890 USE 103 00

Introducing the BM85 Bridge/Multiplexers 7