PC Control / Profi Control 645-12M Instruction Manual pdf - Kuhnke

4.9.2.3.2. Program example: read diagnostic data
This example is to illustrate the typical process of requesting
a service:
; Read diagnostic data of DP slave 1
; Data interface: SBM2.00...
; In this example, the task is started by the following marker:
; - SM00.07
;
******************************************************************************
; —— Is there an active task already?
L DIA_TASK SBM02.00 ; (diagnostic data in task byte)
CMP 0
JP= NEW_TASK ; all bits=0: no task
JP DP_CONT ; else: restart KUBES module
; —— New task requested?
; Activate
NEW_TASK L S1_DIAG SM00.07 ; (task slave 1: read diag. data)
JPCN END ; request no diag. data -> jump
; —— Start service
START L 9 ; service 9
= DIA_TASK SBM02.00 ; (diagnostic data in task byte)
L 1 ; station1
= DIA_PB# SBM02.02 ; (station number diag. data)
L 31 ; number of diag. data bytes
= DIA_LEN SBM02.03 ; (length data field diag. data)
; —— Start KUBES module DP_CTRL
DP_CONT JPK DP_CTRL , _____
DIA_TASK -|_____|-
; Poll task status
L DIA_TASK SBM02.00 ; (diagnostic data in task byte)
JPB FAILURE ; bit7=1: error
CMP 0
JP= OK ; all bits=0: task completed
JP END ; task not completed
; —— Task completed, clear task markers
OK =0 S1_DIAG SM00.07 ; (task: read diag. data of slave 1)
JP END
; —— Error evaluation
FAILURE L DIA_FAIL SBM02.01 ; (error byte diag. data)
END NOP
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