Auber Instruments DSPR300 Buku Petunjuk - Halaman 7

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AUBER INSTRUMENTS

Table 5. Conditions of Relays Become Active or Inactive.

Mashing Mode

Relay

Mode

Active

PV < AL or

Process

AL ≤ PV <

Alarm

PV ≥ AH

PV ≥ (SV

Deviation

+ AH), or

Alarm*

PV < (SV -

AL)

Acceleration

PV < SV**

PV < tSP,

or Preset

Timer***

Mashing

Timer (t) is

reached

Note *: Deviation Alarms are not available in Boiling Mode because there is no

temperature set point.

Note **. The precise turning off point is determined by the AI program.

Note ***: Timer function tF should be set to ON if user wants to set Relay 2 to

Timer mode (RL2 = Time). If timer function tF was set of OFF, Relay 2 will remain

active.

Note 13: Lgc (Relay Logic), determines relay status before and after the alarm

conditions are met. It can be set to Logic Close (RL-C) or Logic Open (RL-O).

When a relay is set to RL-C, the relay is a NO relay, it stays open when it is

inactive; the relay contacts close (pull-in) when alarm conditions are met. When

a relay is set to RL-O, the relay is essentially a NC relay, it stays closed when it

is inactive; the relay contacts open up (drop-out) when alarm conditions are met.

For most applications, the relay should be set to Logic Close (RL-C), which is

the default setting. The Logic Open (RL-O) configuration is useful if user want to

turn on a device when the temperature is not in the alarm zone.

Note 14: LAt (Latching, Pulsing, or Non-Latching Relay Action), determines

the relay actions when alarm conditions are met and/or then removed. It can be

set to Y for Latching Mode, PUL for pulsing mode, or N for Normal Mode.

When LAt is set to Y (Latching Mode), the relay action is latched. It will not

release even if the alarm condition is removed. To release the relay, user must

reboot the controller or use the Reset Key to cancel the relay action (see note

20 for details).

When LAt is set to PUL (Pulsing Mode), the replay action is a timed single pulse.

When the alarm condition is met, relay will be activated only for a pre-determined

period of time. User can set the pulse duration by the AP parameter in the menu

of alarm settings; it ranges from 1 to 100 seconds. This feature is useful in

situations where a user only need to ring the buzzer for a short time or want to

drive an external load for a fixed amount of time duration.

When LAt it is set to N (Non-Latching), the relay action will follow the alarm

condition. The relay stops its action when the alarm condition is removed.

Note 15: SiL (Relay Silence, also called Alarm Suppression), determines

whether a relay action should be suppressed when controller is just powered up.

When SiL is set to Y, Relay Silence is enabled; when SiL is set to N, Relay

Silence is disabled.

Relay Silence/Alarm Suppression is only supposed to work when: 1) controller

is just powered up, and 2) the condition that deactivates the Relay Silence is not

met yet. This feature is available in all relay modes, however, the deactivation

condition varies.

Table 6. Conditions to Deactivate the Relay Silence/Alarm Suppression.

2021.05

Boiling/Distilling Mode

Inactive

Active

PV < AL or

PV > AH

(SV - AL)

≤ PV <

(SV + AH)

PV ≥ SV

PV ≥ bAST

PV < bAST

PV < btSP, or

Preset Boiling

PV > tSP

Timer (bt) is

reached

Relay Mode

Process Alarm

Inactive

Deviation Alarm

AL < PV <

Acceleration

Timer*

For example, if a controller is working in mashing mode and the relay is set as a

process alarm, then alarm suppression will apply to the low limit alarm until the

process temperature reaches the mashing temperature. For another instance, if

a controller is working in boiling/distilling mode, Relay 1 RL1 = ACC, Lgc1 = LC-

C, LAt1 = N. If SiL1 = N, Relay 1 should pull-in when PV < bAST and drop-out

when PV >= bAST. But when SiL1 = Y, Relay 1 will not be activated when PV <

bAST unless PV has reached mashing temperature.

PV ≥ btSP

This feature is useful for the following two situations: A) When a relay is set as

low limit alarm or deviation alarm, and you don't want the relay to pull in when

you just power up the controller as the start-up temperature will be in the alarm

zone. B) When Relay 2 is set to Timer Mode and it is supposed to trigger a

buzzer when the timer is up. Without Alarm Suppression, the relay would pull in

when controller is just powered up before the timer starts counting.

Note 16: Function Key

There are two function keys named "A" and "B" which can be used to

reset/cancel the action of the corresponding relays when they are activated. Key

"A" on the lower left corner is for Relay 1, Key "B" on the lower right corner is for

Relay 2. They only work in Latching Mode or Non-Latching Mode (LAt = Y or N),

and they have no effect in Pulsing Mode (LAt = PuL). By default, Function Keys

are disabled. To enable these two keys, set the parameter "Key", which is the

last parameter listed in the menu of system configuration, to "on" (Key = on).

For a relay whose logic mode is set to Logic Close (Lgc = RL-C), press the

function key when the relay is activated (close) will cancel the relay action, i.e.,

the relay will drop out (open). For a relay whose logic mode is set to Logic Open

(Lgc = RL-O), press the function key when the relay is activated (open) will

cancel the relay action, i.e., the relay will pull in (close).

7.3 Parameters in Alarm Settings

In the menu of alarm settings, there are four sets of parameters for each relay:

AH, AL, HY and AP.

Table 7. Alarm Parameters Listed in Alarm Setting Menu.

Display

Code

AH1

AL1

HY1

AP1

AH2

AL2

HY2

AP2

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Mashing Mode

PV ≥ SV

Alarm Configuration (Alarm parameters part 2)

Description

Setting Range

Alarm 1 high limit

OFF, 1 ~ 9999

Alarm 1 low limit

OFF, 1 ~ 9999

Alarm 1 hysteresis

0.1-100.0

band

Alarm 1 pulse length

1-100

Alarm 2 high limit

OFF, 1 ~ 9999

Alarm 2 low limit

OFF, 1 ~ 9999

Alarm 2 hysteresis

0.1-100.0

band

Alarm 2 pulse length

1-100

Boiling Mode

PV ≥ btSP

Mashing Set Point (SV)

Initial

Remark

Setting

OFF

Note 17

OFF

Note 18

0.3

Note 19

Note 20

OFF

Note 17

OFF

Note 18

0.3

Note 19

Note 20

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