Endress+Hauser iTEMP TMT 165 FOUNDATION Fieldbus Betriebsanleitung Seite 151

FOUNDATION Fieldbus temperature transmitter
Index Parameter
5 MODE_BLK
Endress+Hauser
PID Function Block (PID controller)
Write access with
operating mode
(MODE_BLK)
ROUT - RCAS - CAS - Displays the current (Actual) and desired (Target) operating mode of the PID
AUTO - Function Block, the permitted modes (Permitted) supported by the Resource
MAN - OOS Block, and the normal operating mode (Normal).
Display:
The PID Function Block supports the following operating modes:
• AUTO (Automatic Operation)
The setpoint value specified by the user via the parameter SP is used in
the execution of the internal PID algorithm.
• MAN (Manual Intervention by the Operator)
The parameter OUT can be specified directly by the user.
• OOS (Out Of Service)
The block has the status "Out Of Service". The PID algorithm of the block is
not executed. The last valid value is output at the parameter OUT and the
status changes to BAD.
• CAS (Cascade Mode)
Via the input or parameter CAS_IN, the PID Function Block receives the
setpoint value for internal calculation of the actuating variable directly from
another function block. The internal PID algorithm is executed.
• RCAS (External Cascade)
Via the parameter RCAS_IN, the PID Function Block receives the setpoint
value for internal calculation of the actuating variable directly from the
fieldbus host system. The internal PID algorithm is executed.
• ROUT (External Output)
Via the parameter ROUT_IN, the PID Function Block receives the actuating
value directly from the fieldbus host system.
The actuating variable is output again via the parameter OUT without the
internal PID algorithm being executed.
Description
AUTO
MAN
OOS
CAS
RCAS
ROUT
11 Appendix
151