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büS/CANopen-Design
6.18 Description of the (cyclical) I/O data
Gateway /
SPS
6 byte
1 byte
Process data
Depending on the configuration, the gateway processes
1 ... 6 byte of the process data emanating from the control head
for the position feedback of the position measuring system.
1 byte process data regarding the solenoid valve switching
states are processed by the control head.
For process data, see also chapter “6.5” on page 27
The relevant process data are transfered via Logix Designer as “Controller Tags”:
the (position) feedback signals from S1 ... S4 (bit-coded, see example 1 below) and the current position feedback
signals (“analog”) as well as the solenoid valve switching states V1 ... V3 (bit-coded, see example 2 below)
Example 1
(process data from control head to gateway/PLC):
“Position 1” and “External Initiator” are active:
Example 2
(process data from PLC/gateway to the control head):
“Valve 1” is active:
6.19 Access to parameters (Read / Write)
Some relevant acyclic parameters have been defined for preconfigured gateways which can be read directly with
the
Logix Designer
and partially overwritten - described below in chapters “6.19.1 Parameter – reading via Logix
Designer” and “6.19.2 Parameters – writing via Logix Designer”.
The
Bürkert Communicator (Type 8920)
also makes it easy to read out the parameters and change the values
(see “6.19.3 Access to parameters via Bürkert Communicator” or in the manual for the Bürkert Communicator -
see chapter “5.6.1” on page 24).
In addition to these relevant acyclic parameters, further values and states for acyclic parameters of the büS devices
connected to the gateway can be read out and partially written/overwritten - see “6.19.4 Access to further param-
eters (cyclic and acyclic)”.
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Type 8681 büS/CANopen
Summary of Contents for 8681
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