Festo Контроллер позиционирования CPX-CMAX - Manual (Page 94)

4. Commissioning
4−16
Festo P.BE−CPX−CMA X−SYS−EN en 0908NH
4.5 Structure of the cyclical I/O data
Data Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8
O data Bytes 1 and 2 (fixed)
are retained in every
operating mode
(except for byte 2
during parameterĆ
isation).
They contain control Bytes 3 to 8 depend on the selected operating mode (record select
mode) and transmit further control and status bytes (e.g. CDIR,
SDIR,...), as well as setpoint and actual values:
Ĉ Record number or setpoint position in the output data
Ĉ Feedback of actual position and record number in the input data
Ĉ Other operating mode and control mode−dependent setpoint
and actual values
I data
They contain control
and status bytes
(e.g. CCON,
SCON, ...) for enabĆ
ling the CMAX and
setting the operatĆ
ing modes and actual values.
Procedure
First define the operating mode in the control byte CCON. See
section 4.5.1.
This results in the allocation of the other control and status
bytes:
ć Record select mode, see section 4.5.2.
ć Direct mode, see section 4.5.3.
ć For commissioning and parameterisation, see the CMAX
communication profile" description.
Recommendation: Set the control bit CCON.LOCK during operĆ
ation. This way, the PLC can make sure that the programmed
sequence cannot be disturbed by FCT access.
Or evaluate the status bit SCON.FCT_MMI and take the misĆ
sing control access into account in the program sequence of
the PLC.