Parameter Overview - Siemens SIMATIC MV500 Operating Instructions Manual

9.4.5.2

Parameter overview

Table 9- 44 Overview of FB 79 parameters
Parameter Declaration Data type
LADDR_ INPUT
STEUER
LADDR_ INPUT
STATUS
LADDR_ INPUT
SEND
LADDR_ INPUT
RECV
COMMAND INPUT
PARAM1 INPUT
RESET INPUT
RECV INPUT
ACTIVE OUTPUT
DONE OUTPUT
ERROR OUTPUT
ERRCODE OUTPUT
SIMATIC MV500
Operating Instructions, 03/2021, C79000-G8976-C494-05
Address
(instance DB)
WORD 0.0
WORD 2.0
WORD 4.0
WORD 6.0
WORD 8.0
BYTE 10.0
BOOL 11.0
ANY 12.0
BOOL 22.0
BOOL 22.1
BOOL 22.2
DWORD 24.0
Process interfacing via an automation system (PLC, PC)
Default Description
W#16#0000 Address of the control byte of the optical
reader.
The address must be in the process image of
the CPU you are using.
W#16#0000 Address of the status byte of the optical read-
er.
The address must be in the process image of
the CPU you are using.
W#16#0000 Start address of the "Send" user data interface
of the optical reader.
W#16#0000 Start address of the "Receive" user data inter-
face of the optical reader.
W#16#0000 Job number:
The permitted values are described following
this table.
B#16#00 Number of the program to be selected (rele-
vant only for jobs "W#16#0001" and
"W#16#0002").
FALSE Reset pending error and FB initialization.
Receive area for the result string. Only data
block areas and the "BYTE" data type are per-
mitted.
You must interconnect this parameter and the
data block must be at least as large as the
maximum DMC string that can be expected.
FALSE ACTIVE = TRUE:
Editing of the last job has not yet completed.
FALSE DONE = TRUE:
Job was completed without errors.
With read jobs ("COMMAND = W#16#0081 ...
008F"), this simply means that the transfer
between the optical reader and FB (CPU) was
error-free.
To find out whether the DMC processing was
successful, you will need to process bits
"READ" (bit 3), "MATCH" (bit 4) and "N_OK"
(bit 5) in the status byte of the optical reader.
FALSE ERROR = TRUE:
An error has occurred.
DW#16# Error information:
00000000
• DW#16#0000 0000: No error
• DW#16#0000 wxyz: Warning
• DW#16#0001 wxyz: Internal FB error
• DW#16#0002 wxyz: Optical reader error
(see table below for error information)
9.4 Control with FB 79
187