Description of the blocks
4.7 MMRevDhl motor block
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Programming and Operating Manual, 06/2017, A5E40899442002A/RS-AA/001
Interlocking with Permit, Intlock and Protect
A maximum of three types of interlock can be used for the MMRevDhl block. Three separate
inputs named
Permit,
Intlock
and
Protect
are available for these functions.
Table 4- 97 Interlock types
Input
Value
Meaning
Permit
1
Activation enable ("Permission"):
The activation enable makes it possible to leave the neutral position of
the block in response to operator input or a command from the program
(CFC). The activation enable has no effect if the block is not in the
neutral position.
Intlock
0
Interlock without reset ("Interlock"):
An active interlock condition brings the block to the neutral position.
After the interlock condition has gone, the currently active control func-
tion becomes active again in automatic or local mode. In manual mode
the faceplate can be operated again after the interlock condition has
gone.
Protect
0
Interlock with reset ("Protection"):
An active interlock condition brings the block to the neutral position.
After the interlock conditions are cleared, the operator or an activation
sequence must perform a reset to once again enable activation of the
control according to the input parameters.
Display of interlock
The state of the interlock is visualized in the faceplates and in the block icons.
Table 4- 98 Icons for interlock
Icon
Meaning
No interlock is active
One or more interlocks are pending
No lock
Individual interlocks are not active (the input parameters are inactive; the button in
the faceplate is invisible):
•
Perm_En = 0
or
Permit.ST = 16#FF
•
Prot_En = 0
or
Protect.ST = 16#FF
•
Intl_En
= 0
or
Intlock.ST = 16#FF
Note
No safe position
Motors and values are not put into the safe position if one of the interlock inputs is active
(e.g.,
Intlock
= 0) and the corresponding signal status is 16#FF (
Intlock.ST = 16#FF
).
