Modbus Rtu" Implementation - ProMinent DULCO flex Control Original Operating Instructions

Supplementary operating instructions for Modbus RTU

2.5 "Modbus RTU" implementation

28
1st level 2nd level
Priming time
...
Timer
Field bus Inactive
Active
Passive
...
This chapter contains general information for implementing the
metering pump DULCO flex Control DFXa, DFXa into the serial
communication protocol of the Modbus RTU.
The metering pump DULCO flex Control DFXa, DFXa acts as a
slave (device 1).
Communication is possible between the metering pump DULCO
flex Control DFXa, DFXa (device 1) and external masters (device
0), such as a PLC.
The Modbus protocol is a communication protocol that enables
devices to use data via a joint connection if the devices communi‐
cate with each other via the "Modbus RTU" Modbus Application
Protocol Specification V1.1b3.
The "Modbus RTU" specification describes the "data link layer" and
the physical layer.
The notification structure of the function codes uses "Modbus RTU"
standards.
IEEE 32-bit floating point numbers and integers are used.
3rd level 4th level
Baud rate 9600
19200
38400
Data length 7 bits
8 bits
Stop bits 1
2
Parity none
uneven
even
Termination disabled
enabled
ignored
Modbus 0 ... 10,000 ms
timeout
...