Siemens FM 458-1 DP Manual page 59

SIMOLINK drive coupling
Operating mode
0 Slave mode
The SLB module operates as slave. The SIMOLINK blocks in the CFC chart must be configured
in an interrupt task Ix (x=1 . . . 8).
Timing: an interrupt is initiated each time a SYNC telegram is received, and therefore starts
execution of interrupt task Ix. The received values are read and the values to be sent are written
into the write buffer of the SLB module.
SYNC telegram
Processing time of the
SIMOLINK blocks
1 Asynchronous mode
The SLB module operates as master. The SIMOLINK blocks in the CFC chart must be
configured in a cyclic task Tx (x=1 . . . 5).
Timing: The blocks are executed each time cyclic task Tx starts. The SIMOLINK telegrams are
sent after the last SIMOLINK block has been calculated.
Processing time of the
SIMOLINK blocks
5-2
− Sends an initialization sequence (SIMOLINK) and monitors the
starting sequence
2. The @SL central block executes, in the standard mode ("RUN"
operating status) of the system, the following operating steps:
− Monitors communications of the SIMOLINK drive interface
− Outputs fault messages when communication faults occur at the
outputs
− Outputs information about the drive coupling
− New values for the node address (ASL) and send power (POW)
are only transferred after the SIMOLINK drive coupling restarts.
An SLB module can be initialized and can operate in 6 different operating
modes.
When configuring, the different time characteristics of the SIMOLINK
blocks for the selected operating modes at input MOD.
SYNC telegram
SIMOLINK cycle
SIMOLINK cycle
Cyclic task Tx
SYNC telegram
SIMOLINK cycle
Processing time of the
SIMOLINK blocks
Interrupt task Ix
Processing time of the
SIMOLINK blocks
Processing time of the
SIMOLINK blocks
SIMOLINK cycle
Function Blocks - FM 458-1 DP
Edition 12.2004