Siemens Simatic S7 Series System Manual page 423

Table 9- 12
Parameter
XMT_REQ
(transmit re-
quest)
Drive
Param
Index
DB_Ptr
Done
Error
Value
When the USS_RPM_x instruction completes, the "Done" output is turned on and the "Error"
output byte and the "Value" output contain the results of executing the instruction. The
"Error" and "Value" outputs are not valid until the "Done" output turns on.
S7-200 SMART
System Manual, 09/2015, A5E03822230-AC
USS_RPM_x parameter descriptions
Description
When ON, a USS_RPM_x request is transmitted to the drive on every scan.
Address of the drive to which the USS_RPM_x command is to be sent. Valid ad-
dresses of individual drives are 0 to 31.
Parameter number
Index value of the parameter that is to be read
The address of a 16-byte buffer must be supplied to the "DB_Ptr" input. This buffer
is used by the USS_RPM_x instruction to store the results of the command issued
to the drive.
Turned on when the USS_RPM_x instruction completes
This output byte contains the result of executing the instruction. The USS protocol
execution error codes (Page 428) define the error conditions that could result from
executing the instruction.
Parameter value returned
Libraries
9.2 USS library instructions
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