Siemens SINUMERIK, Commissioning Manual

Page: 441 / 736

Programming
2.7 Functions
Expanding the user interface
Commissioning Manual, 11/2006, 6FC5397-0DP10-0BA0
2-91
Example
WNP("DB20.DBB1",1) ; Write PLC variable
2.7.20 Multiple Read NC PLC (MRNP)
Description
This MRNP command can be used to transfer several system or OPI variables in a single
register access. This access method is significantly faster than reading via individual access
attempts. The system or OPI variables must be included on an MRNP command of the same
area.
The areas of the system or OPI variables are organized as follows:
● General NC data ($MN..., $SN.., /nck/...)
● Channel-specific NC data ($MC..., $SC.., /channel/...)
● PLC data (DB..., MB.., /plc/...)
● Axis-specific NC data on the same axis ($MA..., $SA..)
Programming
Syntax: MRNP
(Variable name 1*Variable name 2[* ...], Register index)
Description: Reads several variables
Parameters: In the variable names, "*" is the separator. The values are transferred
to register REG[Register index] and those following in the order that
the variable names appear in the command.
The following therefore applies:
The value of the first variable is located in REG[Register index].
The value of the second variable is located in REG[Register index +
1], etc.
Notice
It should be noted that the number of registers is restricted and the list of variables cannot
exceed 500 lines.