Parameter
Parameter Declaration Data type Description
NumberOfSlaves IN INT Number of currently used Modbus slaves
WaitCycles IN DINT Minimum number of cycles to wait between two requests
from a slave. This prevents overflows on the slave and
resulting timeouts.
SlavesComData IN-OUT UDT 877 Reference to the data block with all communication objects
13.5.7.7 FB 878 - VMC_RWParameterSys_RTU - Modbus RTU read/write parameters system
This block is used internally by the system for parameter transfer.
You must not call this module, as this can lead to a malfunction of your
system!
13.5.7.8 FB 879 - VMC_ReadParameter_RTU - Modbus RTU read parameters
With this block you can read parameters from the corresponding slave.
Please note that only whole registers can be read as WORD. To evaluate
individual bits, you must swap high and low byte!
Parameter
Parameter Declaration Data type Description
Execute IN BOOL The job is started with edge 0-1.
StartAddress IN WORD Start address of the register from which to read.
Quantity IN BYTE Number of registers to read.
Done OUT BOOL Status
n TRUE: Job successfully done
Busy OUT BOOL Status
n TRUE: Job is running
Error OUT BOOL Status
n TRUE: An error has occurred. Additional error information
can be found in the parameter ErrorID.
ErrorID OUT WORD Additional error information
Ä
Chap. 13.10 ‘ErrorID - Additional error information’
page 637
Data IN-OUT ANY Reference where to store the read data
Axis IN-OUT UDT 879 Reference to the general axis data of the inverter drive
Description
Description
VIPA SPEED7
Motion control - Simple Motion Control Library
Usage inverter drive via Modbus RTU > Drive specific blocks
HB00 | OPL_SP7 | Operation list | en | 18-30 506
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