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feat: Modbus Rtu over tcp enhancement (#9570)

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Marius Bezuidenhout 2021-08-03 23:09:51 +02:00 committed by GitHub
parent 8bf97809a8
commit 1afbff8904
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2 changed files with 27 additions and 10 deletions
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9
plugins/inputs/modbus/README.md
View File

@ -9,7 +9,7 @@ Registers via Modbus TCP or Modbus RTU/ASCII.
[[inputs.modbus]]
## Connection Configuration
##
## The plugin supports connections to PLCs via MODBUS/TCP or
## The plugin supports connections to PLCs via MODBUS/TCP, RTU over TCP, ASCII over TCP or
## via serial line communication in binary (RTU) or readable (ASCII) encoding
##
## Device name
@ -29,15 +29,18 @@ Registers via Modbus TCP or Modbus RTU/ASCII.
# TCP - connect via Modbus/TCP
controller = "tcp://localhost:502"
## Serial (RS485; RS232)
# controller = "file:///dev/ttyUSB0"
# baud_rate = 9600
# data_bits = 8
# parity = "N"
# stop_bits = 1
# transmission_mode = "RTU"
## For Modbus over TCP you can choose between "TCP", "RTUoverTCP" and "ASCIIoverTCP"
## default behaviour is "TCP" if the controller is TCP
## For Serial you can choose between "RTU" and "ASCII"
# transmission_mode = "RTU"
## Measurements
##

28
plugins/inputs/modbus/modbus.go
View File

@ -68,7 +68,7 @@ const description = `Retrieve data from MODBUS slave devices`
const sampleConfig = `
## Connection Configuration
##
## The plugin supports connections to PLCs via MODBUS/TCP or
## The plugin supports connections to PLCs via MODBUS/TCP, RTU over TCP, ASCII over TCP or
## via serial line communication in binary (RTU) or readable (ASCII) encoding
##
## Device name
@ -88,16 +88,19 @@ const sampleConfig = `
# TCP - connect via Modbus/TCP
controller = "tcp://localhost:502"
## Serial (RS485; RS232)
# controller = "file:///dev/ttyUSB0"
# baud_rate = 9600
# data_bits = 8
# parity = "N"
# stop_bits = 1
## For Modbus over TCP you can choose between "TCP", "RTUoverTCP" and "ASCIIoverTCP"
## default behaviour is "TCP" if the controller is TCP
## For Serial you can choose between "RTU" and "ASCII"
# transmission_mode = "RTU"
## Measurements
##
@ -246,9 +249,20 @@ func (m *Modbus) initClient() error {
if err != nil {
return err
}
handler := mb.NewTCPClientHandler(host + ":" + port)
handler.Timeout = time.Duration(m.Timeout)
m.handler = handler
switch m.TransmissionMode {
case "RTUoverTCP":
handler := mb.NewRTUOverTCPClientHandler(host + ":" + port)
handler.Timeout = time.Duration(m.Timeout)
m.handler = handler
case "ASCIIoverTCP":
handler := mb.NewASCIIOverTCPClientHandler(host + ":" + port)
handler.Timeout = time.Duration(m.Timeout)
m.handler = handler
default:
handler := mb.NewTCPClientHandler(host + ":" + port)
handler.Timeout = time.Duration(m.Timeout)
m.handler = handler
}
case "file":
switch m.TransmissionMode {
case "RTU":