Modbus digital input (Discrete Input)

← External Limit

Connect the relay contacts of the control box to the digital inputs of the module. The module must provide the inputs as discrete inputs (function code 02), a closed contact reads as active.

Parameters

Name	Description	Value	Level
`id`	Modbus ID Default: `1`	int	required
`host`	IP address or hostname Example: `192.0.2.2`		required
`port`	Port Default: `502`	int	required
`maxconsumptionpower` [W]	Guaranteed minimum power (Pmin) Power limit applied to the root circuit while the limit is active.		optional
`w4input`	W4 input Digital input number for the W4 signal (Dimmer for controllable loads), counting from 1 (first input = 1) Default: `1`		optional
`w3input`	W3 input Digital input number for the W3 signal (Zero export, 0%), counting from 1 (first input = 1) Default: `2`		optional
`productionnominalmax` [Wp]	Installed generator power Rated generator/module power of the installation (reference value according to § 9 EEG).		optional
`s1input`	S1 input Digital input number for the S1 signal (60% export power limit), counting from 1 (first input = 1) Example: `3`		optional
`s2input`	S2 input Digital input number for the S2 signal (30% export power limit), counting from 1 (first input = 1) Example: `4`		optional

Configuration example for evcc.yaml

If you don't want to configure via the UI, you can alternatively use this YAML block.

hems:
  type: template
  template: fnn-modbus

  # Modbus TCP
  modbus: tcpip
  id: 1
  host:  # Hostname
  port: 502 # Port
  maxconsumptionpower: # Guaranteed minimum power (Pmin) (W), Power limit applied to the root circuit while the limit is active.
  w4input: 1 # W4 input, Digital input number for the W4 signal (Dimmer for controllable loads), counting from 1 (first input = 1)
  w3input: 2 # W3 input, Digital input number for the W3 signal (Zero export, 0%), counting from 1 (first input = 1)
  productionnominalmax: # Installed generator power (Wp), Rated generator/module power of the installation (reference value according to § 9 EEG). (optional)
  s1input: 3 # S1 input, Digital input number for the S1 signal (60% export power limit), counting from 1 (first input = 1) (optional)
  s2input: 4 # S2 input, Digital input number for the S2 signal (30% export power limit), counting from 1 (first input = 1) (optional)