Watlow Series SD31 PID with Optional Countdown Timer User Manual

Page 30

Wa t l o w S e r i e s S D 3 1

■

C h a p t e r 5 S e t u p

Display

Parameter Name

Description

Settings

Range

(Integer values for Modbus

in parentheses.)

Default

Modbus*

(less 40,001

offset)

Read/Write

Appears if:

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.

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

[``rP]
[ rP]

Ramping Mode

Select when the control set point ramps to
the defined end set point.

[`OFF] off (0)
[`Str] ramps on start-up
only (1)
[``On] ramps at start-up or
any set point change (2)

[`OFF] (0)

266 R/W

Always active.

[rP;Sc]
[rP.Sc]

Ramp Scale

Select the scale of the ramp rate.

[hour] degrees/hour (0)
[Min] degrees/minute (1)

[hour] (0)

267 R/W

[``rP] is set to [`Str]
or

[``On].

[rP;rt]
[rP.rt]

Ramp Rate

Set the rate for the set point ramp.

0 to 9999
(0000 to 9999000)

100

*268, 269
R/W

[``rP] is set to [`Str]
or

[``On].

Does not appear if
[``rP] is set to [`OFF].

[Addr]
[Addr]

Modbus Device Address

Set the device address for communica-
tions. Every controller on a network must
have a unique address.

1 to 247

This can
only be set
from the
controller
front panel.

Output 2 is a communi-
cations output.

(SD_ _ - _ _ U _ - _ _ _ _ )

[bAud]
[bAud]

Baud Rate

Set the baud rate at which the communi-
cations occurs.

[9600] 9600 baud
[`19;2] 19,200 baud
[`38;4] 38,400 baud

[9600]

This can
only be set
from the
controller
front panel.

Output 2 is a communi-
cations output.

(SD_ _ - _ _ U _ - _ _ _ _ )

[`LOC]
[ LOC]

Lockout

Set the security level for the user inter-
face.

[```0] (0) No lockout
[```1] (1) Set Point,
Auto/Manual, alarms only
[```2] (2) Set Point,
Auto/Manual, only
[```3] (3) Set Point only
[```4] (4) Full lockout
See the Features Chapter
for details.

[```0] (0)

43 R/W

Always active.