WESTLOCK CONTROLS CORPORATION
280 N. MIDLAND AVE., STE. 258, SADDLE BROOK, NJ 07663 TEL: 201-794-7650 FAX: 201-794-0913
www.westlockcontrols.com
10/5/2013
TECH-477/D.W.O. 21424
Page 62 of 206
Relative
Index
Parameter Name
Description
Default
Value
Read/
Write
the permitted mode. The
actual mode is set
(calculated) by the block
during its execution to reflect
the mode used during
execution. The normal mode
is the desired operating
mode of the block. The
permitted mode shows which
changes of the target mode
are valid for the specific
block to the remote user of
the MODE_BLK parameter.
The effect of mode on the
operation of the Function
Block is summarized as
follows:
Out of Service (O/S):
Transducer Blocks: In O/S
the evaluation of the
measured value(s) and
output value(s) is
Stopped.
Function Blocks: In O/S the
evaluation of the measured
value(s) and output value(s)
is
Stopped.
Physical Blocks: The copying
of the DIAGNOSIS and
DIAGNOSIS_EXTENSION
parameter content to the
PROFIBUS DP Slave_Diag
service is stopped.
Acyclic parameter access is
not affected.
The output value of input
Function Blocks should
maintain the last value. For
output
Function Blocks the output
parameters providing
information to the transducer
blocks shall provide the value
as defined for power loss.
This takes place independent
of the definition of a fail safe
