VE4006P2  M-series Serial Interface Series 2

The Serial Interface consists of a serial card and a terminal block. The card contains two serial communications ports that support RS232 and RS422/485 half duplex, or RS422/485 full duplex signals. These ports are individually configurable and support data rates up to 115 KBaud.
The card has the common DeltaV form factor, allowing it to be plugged into any available slot in the I/O interface carrier. The card is clearly labeled with the interface type. LEDs, located on the front of the card, show the power, error, and port status of the interface at a glance.
The standard Modbus protocol includes the Serial Interface, the Modbus RTU, and ASCII communications protocol as defined in the Modicon Modbus Protocol Reference Manual dated March 1992 (PI-MBUS-300 REV D). Each Serial Interface port may be configured as either a master or slave device.
The serial card supports the following features using the Modbus protocol:
„ Reading input data from Modbus coils, input status, holding registers and normal input registers.
„ Writing output data to coils and holding registers.
„ Output data can be written in single coil, register mode, or complete data set mode. This output mode is a configurable parameter.
„ Input data can be read in as a complete data set, providing the best performance.
The serial card supports the input and/or output of 16 different data sets per serial port, for a total of 32 data sets per Serial Interface.