KROHNE IFC 090, Supplementary Installation & Operation Instructions

Page: 36 / 44

Supplementary Documentation Page 36 of 44
IFC090, IFC090 i with FF
IFC090-FF Configuration
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: krohne@krohne.de
Example:
5.4.4 Setting the Flow Direction
The IFC090-FF integrators are capable of integrating three different kinds of flows:
•
Forward (positive) Flow
•
Reverse (negative) Flow
•
Net Flow (positive- and negative flow)
By default, Integrator 1 is configured to integrate over Forward Flow and Integrator 2 over Reverse Flow.
This configuration can be changed by modifying the parameter INTEG_OPTS in the following way:
•
Flow Forward (default for Integrator 1)
Enable option ‘Flow forward’ in parameter INTEG_OPTS (i.e. set to true), and ensure that option ‘Flow
reverse’ is disabled (i.e. set to false).
•
Flow Reverse (default for Integrator 2)
Enable option ‘Flow reverse’ in parameter INTEG_OPTS (i.e. set to true), and ensure that option ‘Flow
forward’ is set disabled (i.e. set to false).
•
Net Flow
Ensure that both options ‘Flow forward’ and ‘Flow reverse’ are disabled (set to false).
5.4.5 Type of Integration
The IFC090-FF integrators support the following seven Fieldbus Foundation specified integrator types, which
can be selected in parameter INTEG_TYPE:
Integrator Types Description
Up auto Totalization starts with 0.0 and counts up with automatic reset if the setpoint
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 a write to RESET_IN or OP_CMD_INT.
Down auto Totalization starts with the setpoint TOTAL_SP and counts down with automatic
reset if 0.0 is reached.
Down demand Totalization starts with the setpoint TOTAL_SP and counts down. A reset isn’t
performed except a rest is initiated by a write to RESET_IN or OP_CMD_INT.
Periodic Totalization starts with 0.0 and counts up. An 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.