Siemens SIMATIC MV500, Operating Instructions Manual, Page: 205 / 294

Process interfacing via an automation system (PLC, PC)
9.7 Scanner portal application
SIMATIC MV500
Operating Instructions, 03/2021, C79000-G8976-C494-05
205
String
"MO<p1><p2><p3><p4><p5><p6>" (Machine command set digital out)
Table 9- 61 String structure
Characters Description
p1 Number of the logical external signal.
•
Two printable ASCII characters with value "1" to "4"
The values correspond to "EXT_1", "EXT_2", "EXT_3" and "EXT_4".
p2 Level of the signal
•
ASCII characters with the value "0" to "2".
– 0: Set level statically to "low".
– 1: Set level statically to "high".
– 2: Set level for configured pulse time to "high".
p3 Link type
•
ASCII characters with the value "1" to "7"
– 1: Logical "OR"
– 2: Logical "AND"
– 3: Logical "Exclusive OR"
– 4: no link
– 5: Logical "OR not"
– 6: Logical "AND not"
– 7: Logical "Exclusive OR not"
p4 Logical signal for linking.
If p3 = "4", the parameter has no significance.
•
ASCII characters with the value "0" to "5"
– 0: Logical signal "IN_OP"
– 1: Logical signal "TRD"
– 2: Logical signal "RDY"
– 3: Logical signal "READ"
– 4: Logical signal "MATCH"
– 5: Logical signal "NOK"
p5 Reserved
The value must be "0" to retain upwards compatibility.
p6
9.7 Scanner portal application
This section explains how to use multiple optical readers to implement a scanner portal
application.
In a scanner portal application, there is a large field of view that is covered by several
individual readers. The fields of view of the readers overlap. To prevent the same code being
output more than once, the individual readers (slaves) send their read result to a master
reader. The master reader synchronizes the individual results and prevents the output of