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INSTALLATION - Continued
FRONT
COVER
U6
U5
Figure 4. Installation of PID EPROM Set in GPD 503
4. See Figure 4. Remove the standard EPROM set and
install the PID EPROM set as shown. Be sure to locate U5
and U6 in their proper place with notches facing left!
Failure to do this will ruin the EPROMs.
5. Connect feedback and external setpoint (if used)
signals. If the AI-14B card is not used (see Figure 5), the
feedback signal will be at terminal 13 (0-10 Vdc) or
terminal 14 (4-20 mA dc), with terminal 17 being common
for both. If the AI-14B option card is used, it will be the
connection point for the feedback signal (see Figures 2
and 3 and separate instruction sheet 02Y00025-0296).
The setpoint (reference) need not come from an external
signal; it can also come from an internal memory setting
(An-01 through An-04, or An-09) selected by multi-
function inputs.
If the drive is part of a system such as bypass, its signal
connections may be at auxiliary terminal blocks. See
schematic diagram supplied with your order.
6. Replace the front cover. Apply power to the drive.
A " CPF04 " fault code will appear on the Digital Operator
display. A constant initialization (i.e. reset) must be
performed, by entering 1110 (for 2-Wire control) or 1111
(for 3-Wire control) at Sn-03. (See para. 2.25 in technical
Refer to Sheet 1 for latest change.
MAIN
CONTROL
BOARD
DIGITAL
OPERATOR
NOTE
NOTE
manual TM 4231 if not familiar with this procedure.)
2-Wire control is for maintained contact run/stop control;
3-Wire control is for momentary contact run/stop control.
7. Make changes to the constants to suit your application.
Refer to programmable features descriptions in Section 2,
or constant tables in Appendix 1 of the GPD technical
manual, TM 4231.
IMPORTANT
Once the constant initialization for the PID software
EPROM set has been performed, certain constants are
redefined or given new "factory settings" different from
those listed in Appendix 1 or within description para-
graphs in Section 2 of the GPD technical manual. Review
the PID CONSTANT SETTINGS section at the end of this
instruction sheet before programming any constants.
IMPORTANT
The constant initialization performed in step 6 sets
Sn-19 to 00 ; PID software is disabled. Sn-19 must be set
to value 09 , or AI-14B card must be installed, in order to
enable the PID algorithm.
PID ADJUSTMENTS
Constants related to the PID algorithm (as identified in
Figures 1, 2 and 3) have default values (i.e. "factory
settings") as listed in the PID CONSTANT SETTINGS
section at the end of this instruction sheet. It may be
necessary to adjust these to suit your application.
Proportional Gain, Integral Time and Derivative Time
adjustments are somewhat interactive. Fine tuning may be
required. In general, the Proportional Gain will affect the
rise time; the Integral Time will affect the steady state
error; and the Derivative Time will affect the overshoot.
Each of these settings also has a significant effect on
system stability.
DWG. NO. 02Y00025-0346
SHEET NO. 5 OF 10
EFF. 6/12/92
( m - df )
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