Supplementary Documentation
Page 24 of 44
IFC090, IFC090 i with FF
IFC090-FF Block Description
IFC090 FF 01/2005
KROHNE Messtechnik GmbH & Co. KG · Ludwig-Krohne-Str. 5
D-47058 Duisburg
Tel.: 0203-301 309
Fax: 0203-301389 · E-mail: [email protected]
Parameter
Access
Description
INTEG_TYPE R/W
INTEG_TYPE defines the type of counting (up or down) and the type of
resetting the totalization. The following types are available:
Up auto
Totalization starts with 0.0 and counts up with
automatic reset if
TOTAL_SP
is reached.
Up demand
Totalization starts with 0.0 and counts up. A reset
isn’t performed except either a reset is initiated by
RESET_IN
or
OP_CMD_INT
.
Down
auto
Totalization
starts
with
TOTAL_SP
and counts
down with automatic reset if 0.0 is reached.
Down
demand
Totalization
starts
with
TOTAL_SP
and counts
down. A reset isn’t performed except a reset is
initiated either by
RESET_IN
or
OP_CMD_INT
.
Periodic
Totalization starts with 0.0 and counts up. A
automatic reset is performed in accordance to the
time given in parameter
CLOCK_PER
(
NOTE:
RESET_IN
and
OP_CMD_INT
resets are disabled
and would produce a
‘Wrong Mode For Request’
error).
Demand
Totalization starts with 0.0 and counts up. To
perform a reset, the operator has to write
‘reset’
to
parameter
OP_CMD_INT
.
Periodic & Demand
Same as
‘Periodic’
with the exception that
RESET_IN
and
OP_CMD_INT
resets are possible.
see also:
RESET_
IN
, OP_CMD_INT, N_RESET
MODE_BLK Mix
Display of the current (
actual
), desired (
target
), possible (
permitted
) and
normal
modes of the Integrator Block. By writing a permitted value to the
target field, you can control the execution modes of the block. The following
block modes are allowed for the IFC090-FF Integrator Block:
Automatic Mode (AUTO)
In this mode, the Integrator Block performs its functional computations in
accordance with its configuration automatically. Totalization is active.
Manual
(MAN)
In difference to AUTO mode, the block doesn’t perform an automatic
totalization, but freezes the totalization value to the last one obtained in
Auto mode. The
OUT
status limits switches to constant. In this mode it is
possible to write to the
OUT
value an arbitrary value to test blocks that
use this
OUT
value as input.
Out of Service (OOS)
In this mode, the Integrator Block stops its execution. No totalization is
performed, what can be seen at the status of
OUT
(Bad:OutOfService:NotLimited)
.
N_RESET R
Counts the number of totalization resets. The counter provides verification
that the totalization don’t has been reset since it was last checked.
OP_CMD_INT R/W
Setting this parameter to reset performs a totalization reset according to the
chosen integration type (see parameter
INTEG_TYPE
for details).
see also:
INTEG_TYPE
OUT R/W
The totalization value and status calculated as a result of executing the block.
In Auto mode of this block, the value and its status is automatically calculated
on the base of the calculation methods of the Integrator Block. In Man mode it
is possible to write to this value to specify a known, given value that can be
used to test the correct operation of other downstream function blocks.
