172/176 Appendix
Bosch Rexroth AG, MIT: ID 40, 3 842 530 344/2014-05
Description of transition conditions
The link state is changed either automatically (auto) or by a “CLS” commanded link
state. The number of the transition condition (“TC”) is shown in parentheses.
The PROGRAM state only executes the auto mode function in 3.x versions.
TC Trigger Initial state Target state Comments
(0) Power on SLK off DISCONNECTED SLK turned on
(1) CLS DISCONNECTED
ERROR
CONNECTING HF field turned on, system standing by
for MDTs
(2) CLS CONNECTED
PROGRAM
RECONNECTING RECONNECTING command can come
from the fieldbus or auto mode
(3) CLS CONNECTING
CONNECTED
PROGRAM
ERROR
STOPPING
DISCONNECTING
Switching cancels standby state
both in CONNECTING and when
CONNECTED ends. The final state is
DISCONNECTED in both instances
(4) CLS CONNECTED
PROGRAM
ERROR Commanded link state ERROR
executed
(5) Auto CONNECTING PRECONNECTED MDT signed on
(6) Auto PRECONNECTED PRECONNECTED
Pretransmit
Prefetch
Pretransmits are always executed
before prefetches. If neither are
parameterized, PRECONNECTED
contains no action
(7) Auto PRECONNECTED PROGRAM PRECONNECTED phase completed
without error
(8)
(9)
(10)
(11) Auto PROGRAM CONNECTED CONNECTED active by default when no
user program loaded or auto mode off
(12)
(13) Auto DISCONNECTING DISCONNECTED Communication channel to MDT
closed, HF field turned off
(14) Auto STOPPING DISCONNECTED No longer standing by for MDTs, HF
field turned off
(15) Auto RECONNECTING CONNECTING Communication channel to MDT
closed, SLK standing by for new MDT
sign-on
(16) Auto PRECONNECTED
CONNECTED
CONNECTING Unexpected power-ups received
(17) Auto CONNECTING ERROR Error during MDT sign-on
(18) Auto RECONNECTING
DISCONNECTING
ERROR Error during MDT sign-off
(19) Auto CONNECTED ERROR MDT removed unexpectedly, MDT
lifeguarding automatically switches to
ERROR state
PROOF COPY 1 | 20.05.2014 | FOR INTERNAL USE ONLY
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