Auber Instruments SYL-5352P-S Gebruiksaanwijzing - Pagina 9

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AUBER INSTRUMENTS

7.4. Controlling a 120VAC valve.

1 13 14 6

SYL-5352P

Figure 9. SYL-5352P can be used to control a solenoid valve with an SSR.

8. Programming Examples

Programs in the SYL-53X2P series controllers (including SYL-5342P and SYL-

5352P) have a uniform format of ramp time-soak time-temperature. The

temperature set point of the last step will linearly ramp to the set point of the

current step over the ramp time of current step. Then the set point of current step

will be held over the soak time of current step (optional). Due to the parameter

SSb, even your program a ramp step that is faster than what is the system

capable of achieving, which will result in actual temperature fall behind the

schedule, this controller will automatically pause its timer to wait (see note

5.3.19). The time units are in minutes by default. To change timer unit in seconds,

please see note 5.3.16.

8.1. Example 1: holding the oven temperature at 800° C for 2 hours.

Assuming that the heater is able to heat the oven from ambient (25° C) to

800° C within 30 minutes, we can write a program like this:

Step 1: r01 = 2000, t01 = 0, C01 = 25. Initial step.

Step 2: r02 = 30, t02 = 120, C02 = 800. Ramp up from 25° C to 800° C in 30

minutes, then hold there for 120 minutes.

Step 3: r03 = 0, t03 = 0, C03 = 0. End of the program.

The temperature profile is shown below in Figure 11.

Temp

(° C)

1. Ramp

2. Soak

800

Figure 10. Temperature profile of an oven that is programmed to hold

temperature at 800° C for 2 hours. The solid line is the temperature when the

oven is capable of ramping up from 25° C to 800° C in 30 min; the dashed line is

the temperature profile when the oven needs longer time to ramp up to 800° C.

Note 1: To turn off the heater after the program, change LOOP to 0, so the

program will not auto restart.

Note 2: The value of C[n] is the end temperature of step n. For instance, C01 is

always the temperature at the end of step 1, and C02 is the end temperature of

step 2. Usually C01 should be the ambient temperature, and r02 is the ramp time

from step 1 to step 2.

2020.06

Solenoid valve

SSR

120VAC

3. Natural cooling

150

Note 3: If the heater is not capable of heat the oven from 25° C to 800° C in 30min,

the actual oven temperature can fall behind the schedule. Safety start band will

be triggered to pause the timer until the reading temperature gets close. The

timer for step 2 (the soak section) will start even when temperature is still a little

120VAC

bit below 800° C; and so the actual soaking time will be less than 2 hours. Please

see the dashed line in Figure 10.

8.2. Example 2: program alarm relay actions

The following example includes 4 steps: linear temperature heating, maintaining

a constant temperature, linear temperature cooling and maintaining a constant

temperature. At the end of all steps, the controller will jump to step 1 and restart

the program.

Steps:

Step 1: r01 = 2000, t01 = 0, C01 = 100. Initial step

Step 2: r02 = 30, t02 = 60, C02 = 400. Ramp up from 100° C to 400° C in 30

minutes (ramp speed is (C02 - C01) / r02 = 10° C /minute), then maintain at

400° C for 60 minutes.

Step 3: r03 = 120, t03 = 60, C03 = 160. Ramp down from 400° C to 160° C in

120 minutes (ramp speed is (C03 – C02) / r03 = -2° C /minute), then maintain at

160° C for 60 minutes.

Step 4: r04 = 0, t04= 0, C04 = 0. End of the program

Parameters:

SSb = 5. Safety start band is set to 5 degree.

LOOP = 1. Program automatically looping is enabled.

ALP = 1. Alarm 1 is set to absolute high alarm.

AL1 = 420° C. Alarm 1 will be activated when reading temperature is over 420° C

AL2 = 10. Program ending alarm is set to 10s. Once all the steps have been

executed, alarm 2 will be activated for 10s.

Note: When the program jumps back to step 1, the oven temperature is still at

160° C, the program will pause until the temperature drops within the deviation

alarm range of the new set point. As the deviation high alarm is set to 5° C, the

program will resume (from the beginning) as soon as the temperature drops

below SV + SSb = 105° C.

The temperature control block is shown below.

AL1 OFF

Temp

(° C)

2. Soak

400

1. Ramp

160

Time (min)

100

Figure 11. Temperature profile and relay AL1 & AL2 actions in the example

program.

8.3. Example 3: heat treatment oven

A heat treatment oven needs to heat up to 375° F at its maximum speed. Then

hold the temperature for 20 minutes. After that, pull in the AL2 relay for 2 minutes.

If the temperature is higher than 450° F, trigger the AL1 relay. This application

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AL1 ON

AL1 OFF

AL2 ON

AL2 OFF

3. Cool down

4. Hold

Ready section,

no timing

210

Relay AL1

(High Temp)

Relay AL2

AL2 OFF

(Program End)

1. Ramp,

new cycle

Time (min)

P9/10