iv ï Important CommentsLegal PrinciplesWAGO-I/O-SYSTEM 750I/O Modules2.1.1.9 Data channel for parameter exchange........................................... 362.1.1.9.1 Introduction .............................................................................. 362.1.1.9.2 Register structure ..................................................................... 362.1.1.9.2.1 Parameter data (Register 56) ............................................... 362.1.1.9.2.2 Communications control (Register 57) ............................... 372.1.1.9.3 Parameter sets........................................................................... 382.1.1.9.3.1 General parameter data (system parameter range) .............. 382.1.1.9.3.2 Bus module-specific parameter data ................................... 392.1.1.9.4 Parameter transmission process ............................................... 392.1.1.9.4.1 Determining the maximum bus module parameter data(system parameters)............................................................. 392.1.1.9.4.2 Setting the monitoring time (system parameters)................ 402.1.1.9.4.3 Restoring factory settings (system parameters)................... 402.1.1.9.4.4 Reading/writing parameters (module-specific) ................... 412.1.1.9.4.5 Example: Configuring AS-Interface process data andmailbox ................................................................................ 422.1.1.10 Extended diagnostics of the AS-Interface master......................... 432.1.1.10.1 List of AS-Interface slaves, which have initiated configurationerrors (LCS).............................................................................. 432.1.1.10.2 Protocol analysis: Counter for transmission errors for datatelegrams .................................................................................. 432.1.1.10.3 Offline phase in the case of configuration errors ..................... 432.1.2 Node Design ...................................................................................... 452.1.2.1 Grouping of AS-Interface Master Modules .................................. 453 Working with the AS-Interface master module 750-655....................... 463.1 Set up and configuration with WAGO-I/O-CHECK 2........................... 463.1.1 Setting up the AS-Interface process data and mailbox length........... 463.1.2 Setting up the operating mode for the AS-Interface master .............. 473.1.3 Including a new slave in the AS-Interface network .......................... 473.1.4 Selecting an AS-Interface slave from the slave overview................. 483.1.5 Configuring an AS-Interface slave .................................................... 483.1.6 Observing and setting up AS-Interface process data......................... 493.1.7 AS-Interface diagnostics.................................................................... 494 Fieldbus-specific behavior ........................................................................ 504.1 CANopen................................................................................................ 504.1.1 Accessing the process image ............................................................. 504.1.1.1 Example ........................................................................................ 534.2 DeviceNet ............................................................................................... 554.2.1 Accessing the process image ............................................................. 554.2.1.1 Example ........................................................................................ 554.3 ETHERNET ........................................................................................... 574.3.1 Modbus protocol................................................................................ 574.3.1.1 Accessing the process image ........................................................ 574.3.1.1.1 Example.................................................................................... 574.3.2 ETHERNET IP protocol.................................................................... 594.3.2.1 Accessing the process image ........................................................ 594.3.2.1.1 Example.................................................................................... 59