an input value of 3.14 with 100 as scale is sent as 314, then it can be divided by the same scale to obtain the real value of 3.14).Īddress offset and number of Digital Inputs to use (max 256).Īddress offset and number of Digital Outputs to use (max 256).Īddress offset and number of Register Inputs to use (max 64).Īddress offset and number of Register Outputs to use (max 64). S7 200 Modbus Slave Library Code Onto ANY Just connect a PC straight up to your freshly programmed arduino, and run some sort of MODBUS master or test software, using the register number as listed in the code. Using this approach, a floating sensor's value can be converted into an integer, sent to the client and converted back to a real number by dividing it by the scale factor (e.g.

Where to write analog sensor values (Input Registers or Holding Registers).įrom where to read analog actuator values (Holding Registers or Input Registers).įloating sensor values are multiplied by this value actuator values are divided by it. Where to write digital sensor values (Inputs or Coils).įrom where to read digital actuator values (Coils or Inputs). Periodically tries to connect to the PLC. The Modbus RTU architecture is based upon a Master-Slave orientation in which the PositionServo drive is always a slave node.

The order number for this optional ADD ON function library is 6ES7830-2BC00-0YX0. Configuration Modbus Scan 64 Auto connect 'In order to be able to work with the Modbus RTU protocol you must have purchased the software 'SIMATIC STEP 7 Micro/WIN ADD ON: Function Library V1.1 (USS + MODBUS) for STEP 7 Micro/WIN 32'.

S7 200 modbus slave library download