Fieldbus Section 1 Overview
16 M&I – AC 900F Controller
Telecontrol protocol
The function blocks of the telecontrol library are designed for the connection
between the Freelance Engineering tool and external systems. The link is made via
the serial interface (RS-232) or the Ethernet interface of the CPU module. The
telecontrol protocol complying to IEC 60870-5-101 (serial)/IEC 60870-5-104
(TCP/Ethernet) is used.
For the serial interface, the telecontrol protocol provides device modules for
symmetrical data transmission (FWK_DEV), asymmetrical data transmission as a
master (FWK_DEV_M) and asymmetrical data transmission as a slave
(FWK_DEV_SL). These modules are configured in the hardware structure. Please
refer to the Engineering Manual, System Configuration, Hardware Structure for
more detailed information.
For Ethernet-supported communication, the Ethernet interface and the parameters of
the IEC 60870-5-104 compliant protocol must be set in the FWK_DEV_104
function block designed for telecontrol connection in the Ethernet network. The
FWK_DEV_104 device module can be configured in the hardware structure below
the Ethernet interface of the AC 900F.
ABB CAN Bus protocol
The CAN Bus of the AC 900F controller is intended to be used for connecting rack-
based Freelance I/O modules only. With this feature, the current AC 900F controller
CPU modules of type PM 902F/901F can alternatively take over the tasks of the
CPU module types DCP 02/10 of the Freelance rack system.
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