Watlow Series SD31 PID with Optional Countdown Timer Instrukcja Użytkownika Pobierz pdf (Strona 33)

Watlow Series SD31 ■ 31 ■ Chapter 6 Operations

Display Parameter Name

Description

Settings Range

(Integer values for Modbus

in parentheses.)

Default Modbus*

(less 40,001

offset)

Read/Write

Appears if:

Note: Parameters appear on the Operations Page only if activated from the Programming Page. See page 16 for Operations Page defaults.

Note: Some values will be rounded off to fit in the four-character display. Full values can be read with Modbus.

* Low register numbers contain the two higher bytes; high register numbers contain the two lower bytes of the four-byte integer.

Decimal precision is implied at three decimal places unless otherwise noted.

** This value multiplied by 100 equals the percent power.

Caution: Writing to registers continuously, such as ramping set points via comms, will damage the SD31 EEPROM memory. See page 59.

[rA;Cl]

[rA.CL]

Rate Cool

Set the PID rate time in minutes for the

cool outputs.

0.00 to 9.99 minutes

(0000 to 99990)

0.00: disabled

0.00

*230, 231

R/W

At least one output is

set to [CooL], [Cl;m]

is set to [`PId], and

[Unit]

is set to

[``US].

[dE;CL]

[dE.CL]

Derivative Cool

Set the PID derivative time in minutes

for the cool outputs.

0.00 to 9.99 minutes

(0000 to 99990)

0.00: disabled

0.00

*230, 231

R/W

At least one output is

set to [CooL], [CL;m]

is set to [`PId], and

[Unit]

is set to

[``SI].

[dB;Cl]

[db.CL]

Dead Band Cool

An offset of the cooling proportional

band from the set point.

0 to 999

(0000 to 999000)

*281, 282

R/W

At least one output is

set to [Cool] and

[CL;m] is set to

[`PId].

[C;hyS]

[C.hyS]

Cool Hysteresis

Set the control switching hysteresis for

on/off control. This determines how far

into the “on” region the input needs to

move before the output actually turns

on.

1 to 999°F if [`Sen] is set

to [``tc] or [`rtd]

(1000 to 999000)

0.000 to 999.9 if [`Sen] is

set to [`ma] or [uolt]

(0000 to 999000)

1.000

*236, 237

R/W

*238, 239

R/W

At least one output is

set to [CooL] and

[CL;m] is set to

[on;oF].

[ProP]

Proportional Term

View the active proportional term for

PID diagnostics.

0.000 to 1.000**

(0000 to 1000)

258 R

Any output is set to

[heat] or [Cool].

[``it]

[ it]

Integral Term

View the active integral term for PID di-

agnostics.

0.000 to 1.000**

(0000 to 1000)

259 R

Any output is set to

[heat] or [Cool].

[``dE]

[ dE]

Derivative Term

View the active derivative term for PID

diagnostics.

0.000 to 1.000**

(0000 to 1000)

260 R

Any output is set to

[heat] or [Cool].

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 71 72

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