Honeywell EXCEL 5000 User Manual

ALPHABETIC REFERENCE EXCEL CARE CONTROL ICONS
74-5577–33 (US) 202
EN2B-0184 GE51 R0518 (Europe)
PID Controller (if W is NOT entered as a parameter)
P3 Proportional band Xp
P4 Derivative time Tv (in seconds).
P5 Integral action time Tn (in seconds). If you set Integral action time to zero in the
internal parameters dialog box, software sets the P4 parameter to 1,000,000. A
number this large effectively disables the integral term.
P6 Minimum output (in percent)
P7 Maximum output (in percent)
P8 Actual integral action time Tn (in seconds). If XD1 is zero, P8 is also zero. If
XD1 is one, P8 contains the user-defined value of Tn stored in P5.
PID Controller (if W is entered as a parameter)
P3 Proportional band Xp
P4 Derivative time Tv (in seconds).
P5 Integral action time Tn (in seconds). If you set Integral action time to zero in the
internal parameters dialog box, software sets the P4 parameter to 1,000,000. A
number this large effectively disables the integral term.
P6 Minimum output (in percent)
P7 Maximum output (in percent)
P8 Reference variable (W)
P9 Actual integral action time Tn (in seconds). If XD1 is zero, P9 is also zero. If
XD1 is one, P9 contains the user-defined value of Tn stored in P5.
Recommended PID Plus Gains The following parameter values are recommended based on a 5-second controller
cycle time.
Temperature Control Application
Type of
Control
Gain
Units
Mixed
Air
Cooling Coil
Heating Coil
P
Xp
f
13
20
20
PI
Xp
f
13
20
20
Tn
sec
800
143
83
PID
Xp
f
13
20
20
Tn
sec
1333
143
83
Tv
sec
6
30
15
PID Plus Algorithm The PID algorithm is based on the discrete form of the non-iterating PID formula:
Y = 50 + (100 * E
n
/ Xp) + (100 / (Xp * Tn)) *
∑
=
n
i
0
(E
i
* to) + (100 * Tv / Xp)*((E
n
- E
n-1
) / to)

Honeywell EXCEL 5000 Specifications

General

Brand	Honeywell
Model	EXCEL 5000
Category	Control Systems
Language	English