Technical data

Technology DBs
CPU 317T: Technology Functions
7-26 A5E00251798-03
7.9 "MCDevice" - Technology DB
Valid for firmware version V3.1.x of the integrated technology
The technology DB "MCDevice" contains general information on the integrated
technology. Information on the various TOs is found in the corresponding DBs.
The DB is described in the integrated technology section and is read-only in the
STEP 7 user program.
The DB is non-retentive, irrespective of the retentivity setting of the CPU.
Variable UpdateFlag/UpdateCounter
See: Technology DB updates
Variable ErrorID
Indicates the ErrorID of the most recently detected error. The error must be
eliminated and can not be acknowledged.
Variable ErrorBuffer[0..2]
Buffer for the first three errors and warnings. The first error is written to ARRAY
element 0, the second to ARRAY element 1, etc.
This content of the buffer can be cleared by calling FB 402 "MC_RESET"
(with Axis = number of the technology DB).
Variable Reserve34
The variable is reserved for internal functions. It does not contain user-relevant
information.
Variable MaxLoopDuration
Shows the maximum command execution time of the integrated technology.
The entry is deleted by calling FB 402 "MC_RESET" (with Axis = MCDevice DB).
Variable CmdLoopDuration
Indicates the command execution cycle of the integrated technology, averaged
over the seconds.
The entry is deleted by calling FB 402 "MC_RESET" (with Axis = MCDevice DB).
Variable StationLifeList[0..127]
The ARRAY of this variable lists all available partner stations on PROFIBUS
DP(DRIVE). The index of the ARRAY element corresponds with the PROFIBUS
address. A value 1 in an element indicates that the partner station can be reached,
while the value 0 indicates that the station can not be reached.