ifm
Supplementary device manual DeviceNet interface in the AS-i ControllerE (AC1318, AC1324), Target from 15
2012-02-29
Function
The DeviceNet fieldbus interface
35
5.2
The DeviceNet fieldbus interface
Connection of the hardware .........................................................................................................35
The dual-ported RAM...................................................................................................................35
10551
The AS-i controllerE devices AC1318 and AC1324 have a DeviceNet fieldbus interface. Connection to
the DeviceNet is made via a 5-pole Combicon connector with screw terminals.
The data exchange between DeviceNet fieldbus interface and the PLC function in the controllerE is
carried out via a transfer memory (dual-ported RAM or short DPRAM) which contains maximum 512
bytes of input and output data respectively.
5.2.1
Connection of the hardware
10552
The controllerE devices AC1318 and AC1324 feature 5-pole Combicon connectors with screw
terminals for the connection of the devices to DeviceNet.
Wiring diagram:
Contact
Signal
1 V-
2 CAN_L
3 SHIELD
4 CAN_H
5 V+
5.2.2
The dual-ported RAM
10553
In order to understand the settings of the fieldbus interface it is important to understand the function of
the dual-ported RAM. The dual-ported RAM, in the following called DP-RAM, is a memory range which
constitutes the interface between the controllerE data and the data of the fieldbus interface. The DP-
RAM consists of two different ranges:
the
so-called
IN
range which provides data from the controllerE to the fieldbus interface
(controllerE output data),
the
so-called
OUT
range which provides data from the fieldbus interface to the controllerE
(controllerE input data).
