Modbus and Redis Integration
Powerful performance with an easy integration, powered by Telegraf, the open source data connector built by InfluxData.
This is not the recommended configuration for real-time query at scale. For query and compression optimization, high-speed ingest, and high availability, you may want to consider Modbus and InfluxDB.
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Powerful Performance, Limitless Scale
Collect, organize, and act on massive volumes of high-velocity data. Any data is more valuable when you think of it as time series data. with InfluxDB, the #1 time series platform built to scale with Telegraf.
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Input and output integration overview
The Modbus plugin allows you to collect data from Modbus devices using various communication methods, enhancing your ability to monitor and control industrial processes.
The Redis Time Series output plugin is designed to publish metrics to a Redis efficiently.
Integration details
Modbus
The Modbus plugin collects discrete inputs, coils, input registers, and holding registers via Modbus TCP or Modbus RTU/ASCII.
Redis
The Redis output plugin writes metrics to the Redis server.
Configuration
Modbus
[[inputs.modbus]]
name = "Device"
slave_id = 1
timeout = "1s"
configuration_type = "register"
discrete_inputs = [
{ name = "start", address = [0]},
{ name = "stop", address = [1]},
{ name = "reset", address = [2]},
{ name = "emergency_stop", address = [3]},
]
coils = [
{ name = "motor1_run", address = [0]},
{ name = "motor1_jog", address = [1]},
{ name = "motor1_stop", address = [2]},
]
holding_registers = [
{ name = "power_factor", byte_order = "AB", data_type = "FIXED", scale=0.01, address = [8]},
{ name = "voltage", byte_order = "AB", data_type = "FIXED", scale=0.1, address = [0]},
{ name = "energy", byte_order = "ABCD", data_type = "FIXED", scale=0.001, address = [5,6]},
{ name = "current", byte_order = "ABCD", data_type = "FIXED", scale=0.001, address = [1,2]},
{ name = "frequency", byte_order = "AB", data_type = "UFIXED", scale=0.1, address = [7]},
{ name = "power", byte_order = "ABCD", data_type = "UFIXED", scale=0.1, address = [3,4]},
{ name = "firmware", byte_order = "AB", data_type = "STRING", address = [5, 6, 7, 8, 9, 10, 11, 12]},
]
input_registers = [
{ name = "tank_level", byte_order = "AB", data_type = "INT16", scale=1.0, address = [0]},
{ name = "tank_ph", byte_order = "AB", data_type = "INT16", scale=1.0, address = [1]},
{ name = "pump1_speed", byte_order = "ABCD", data_type = "INT32", scale=1.0, address = [3,4]},
]
Redis
[[outputs.redistimeseries]]
## The address of the RedisTimeSeries server.
address = "127.0.0.1:6379"
## Redis ACL credentials
# username = ""
# password = ""
# database = 0
## Timeout for operations such as ping or sending metrics
# timeout = "10s"
## Enable attempt to convert string fields to numeric values
## If "false" or in case the string value cannot be converted the string
## field will be dropped.
# convert_string_fields = true
## Optional TLS Config
# tls_ca = "/etc/telegraf/ca.pem"
# tls_cert = "/etc/telegraf/cert.pem"
# tls_key = "/etc/telegraf/key.pem"
# insecure_skip_verify = false
Input and output integration examples
Modbus
- Basic Usage: To read from a single device, configure it with the device name and IP address, specifying the slave ID and registers of interest.
- Multiple Requests: You can define multiple requests to fetch data from different Modbus slave devices in a single configuration by specifying multiple
[[inputs.modbus.request]]sections. - Data Processing: Utilize the scaling features to convert raw Modbus readings into useful metrics, adjusting for unit conversions as needed.
Redis
- Metrics Storage: Utilize the Redis output plugin to store time-series metrics collected from various sources directly into a Redis database for quick retrieval and analysis.
- Dynamic Configuration: Adjust the
addressand other settings dynamically to publish metrics to different Redis instances based on the deployment environment. - String Field Conversion: Leverage the
convert_string_fieldsoption to automatically convert string metrics to numeric formats, ensuring that data is stored in the desired type for analytics.
Feedback
Thank you for being part of our community! If you have any general feedback or found any bugs on these pages, we welcome and encourage your input. Please submit your feedback in the InfluxDB community Slack.
Powerful Performance, Limitless Scale
Collect, organize, and act on massive volumes of high-velocity data. Any data is more valuable when you think of it as time series data. with InfluxDB, the #1 time series platform built to scale with Telegraf.
See Ways to Get Started
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