Despatch Protocol Controller User Manual

Page 27

Table 6

Tuning Outline

Display

Description

TUNE
CODE
PID TUNE
P-1
I-1
D-1
DEG -
SPL -
CZO -
DIS
BEEP
PF-RECVR

DIG COMM

RECONFIG
PROF CLR
VARS CLR

CODE *E*

Selects tune mode.
Enter + - - + - +
Enter tuning parameters.
Proportional band in degrees (+/- keys).
Reset in seconds/repeat (+/- keys).
Rate in degrees/second

keys).

Select

EC or EF (+/- keys).

Setpoint limit, set to maximum temperature of oven (+/- keys)
Calibration zero offset -99.9 to 99.9 (+/- keys).
Time set in MMSS (minutes/seconds) or HHMM (hours/minutes).
Select beep on or off (+/- keys).
Power failure recovery mode. Use + or - keys to select from STOP, RESUME or
HOLD.
C

STOP - Program terminates. must restart from the beginning of the program.

RESUME - When power is restored, program resumes at the point where power
failure occurred.

HOLD - Program waits for the operator. The operator has a choice of terminating
or resuming the program.

Digital communications option. Disregard unless Protocol is supplied with optional
digital communications interface. For proper setting, refer to the protocol software
manual or the Digital Communication User Guide. Select from NO COMM, CPIF or
ASCII (+ or - keys). Select from RS232C or RS422A (+ or - keys). Select address
(ADDR) from 1 to 999 (+ or - keys).
C

NO COMM - No digital communication.

CPIF - Computer interface mode communications (used for Protocol software)

ASCII - ASCII line mode communications (used for user-created programs)

For saving changes to DIG COMM options in memory.
Entering code clears all profiles to default values.
Entering code clears the SRAM in Protocol. All parameters must be reset. Should be
done in EXTREME circumstances only. Recalibration is essential.
To turn events relays on in the profile mode. Do not change the code setting.

Experience and experimentation with tuning parameters will guide the user in
determining the proper settings when normal conditions are not present.