YOKOGAWA F3CU04-1S User Manual

C4-6
IM 34M06H62-02E 2nd Edition : June 2008-00
Example specifying SP Up Gradient (SPR.UP)
This example illustrates the use of the SP Up Gradient (SPR.UP) parameter
(see Figure C4.3).
The system is operating with 1.SP and then switched to 2.SP. The CSP rises at a fixed
rate. In the following example, the temperature difference between 2.SP and 1.SP is
140ºC, and it is desired to achieve this temperature change in 2 minutes. Hence,
SPR.UP is set to 70 (ºC/minute).
70°C/minute
SPR.UP=140/2=70(°C/minute)
Duration for
temperature rise
= 2 minutes
2.SP1.SP
SPNO is
changed
2.SP=640°C
1.SP=500°C
Temperature
difference = 140°C
SPR.TM = 1 (minute)
Figure C4.3 Example Specifying SP Up Gradient
*: The time unit can be hour or minute, and is specified using the SP Gradient Time Unit (SPR.TM) parameter.
Temp. diff. (C) 140C
Time (minute)* 2 minutes
SPR.UP =
= 70 (C/minute)
=

YOKOGAWA F3CU04-1S Specifications

General

Brand	YOKOGAWA
Model	F3CU04-1S
Category	Control Unit
Language	English