14 Configuration – in setup program only
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14.4 Modbus frames for reading
This function is used to compile up to eight Modbus frames for reading process values of ex-
ternal devices (via interface) individually for each opposite side. The process values (analog,
integer, and digital values, and text) are written to the selected variables from the received Mod-
bus telegram and are available for use in the system. Each frame can be used to configure up
to 64 entries (variables); the process values are then grouped and transferred in a Modbus tele-
gram.
Setup dialog
Configuration and use of the Modbus frames for reading is described in the Modbus interface
description B 705060.2.0.
CAUTION!
A variable can be used in multiple frames.
This means that different process values are written to the same variable.
You must ensure that no variables are overwritten unintentionally.
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