Watlow EHG SL10 User Manual

Series EHG SL10

Integrated Temperature Controller

User’s Guide

The Series EHG SL10 is a powerful instrument that integrates a temperature process controller, high-low temperature alert, and power switching with a safety high limit that meets UL® 1998 and CE 60730 requirements. The optional display and communications modules can be easily upgraded in the field to provide a digital display, adjustable control parameters, RS-485 MODBUS communications and other interface features. The compact design, inherent reliability and integrated safety limit functions make this control a tremendous value. The control is designed for easy integration with Watlow heaters providing additional value to simplify the engineering and component count on new equipment. CE compliance and UL recognition will reduce time and costs necessary for global agency testing and validation for OEMs.

Features

Standard Base Module

•Two, type K thermocouple inputs: process temperature controller and safety limit

•Process temperature output: 10 amp “NO ARC” relay

•Safety limit: 10 amp relay

•High-low temperature alert: 2 amp, 30Vı (ac/dc), Form A relay

•On-off and PID temperature control algorithm: Upgraded via communications to PID algorithm (minimum cycle time 5 seconds)

0600-0050-0000 Rev. D

February 2011

Integrated Temperature Control

•Standard Molex Connectors

•Dimensions

Configuration	Width	Depth	Height
basic unit	88.8 mm	40.2 mm	55.8 mm
	(3.496 in)	(1.582 in)	(2.196 in)
with mounting bracket	88.8 mm	48.4 mm	55.8 mm
	(3.496 in)	(1.907 in)	(2.196 in)
with communicatons-dis-	88.8 mm	63.6 mm	55.8 mm
play module & mounting	(3.496 in)	(2.503)	(2.196 in)
bracket

Optional Communications Module

•Field adjustable set point

•Access to PID parameters

•Modbus RTU Communications

•RS-485

•3-character, 7-segment LED display

•User Interface Software

The Series EHG SL10 User’s Guide is copyrighted by Watlow Winona, Inc., © February 2011, with all rights reserved.

Patent Pending

Watlow Winona

1241 Bundy Boulevard

Winona, MN 55987

Phone: [phone]; Fax: [phone]

http://www.watlow.com

Navigating the Series EHG SL10 with the Front Panel

The three-character display normally shows the process temperature. To view and change the existing Set Point value follow the steps below:

1.Press the Mode Key once. The right decimal point will illuminate when viewing the Set Point value.

2.Press the Up-Arrow or Down-Arrow Key to change the Set Point.

3.Press the Mode Key again to return to the process temperature display.

The display will automatically return to showing the process temperature after three seconds.

To view or change parameter values follow the steps below:

1. Hold down both the Up-Arrow and Down-Arrow Keys for five seconds.

This will display the Set Point High Limit prompt.

2.Press the Mode Key to view the other parameter prompts.

3.Press the Up-Arrow or Down-Arrow Key once to view a parameter’s value.

4.Press the Up-Arrow or Down-Arrow Key to increase or decrease that value.

5.Press the Mode Key to again display the prompt and again to display the next prompt.

6.Press the Mode Key at the Display Build Number prompt to return to the process value display.

				Modbus	Data Type
Display	Parameter Name & Description	Range	Default	Relative	& Read/
				Address	Write
	Process Value Controller	-18 to 400°C (0 to 752°F)	20°C (68°F)		unsigned
Numeric	View the present Process Value.			20	integer
					R
	Closed Loop Set Point	0°C (32°F) to Set Point High Limit	150°C (302°F)		unsigned
Numeric	Set the set point that the controller will au-			34	integer
	tomatically control to.				RWE
No Dis-	Heat Output Power	0 to 100%	0		unsigned
	Read (via Modbus communications) the			22	integer
play
	present heat output power level.				R
No Dis-	Alert Status	Alert Low (7)	Alert None		unsigned
	Read (via Modbus communications) the	Alert High (8)		31	integer
play
	present alert status.	Alert None (6)			R
No Dis-	Process Comparison Value	5 to 30°C (9 to 54°F)	20°C (68°F)		unsigned
	Set or read (via Modbus communications)			68	integer
play
	the Process Comparison Value.				RWE
	Limit Status	Bit 5 (0x0020)	0		unsigned
No Dis-	Read (via Modbus communications) the	0 = Not tripped (process value below			integer
	present condition of the limit.	limit high set point)		63	R
play
		1 = Tripped (process value exceeds
		limit high set point)
No Dis-	Controller Sensor Status	Bit 2 (0x0004)	0		unsigned
	Read (via Modbus communications) the	0 = Good		23	integer
play
	present status of the controller sensor.	1 = Failure			R
No Dis-	Limit Sensor Value	-18 to 400°C (0 to 752°F)	20°C (68°F)		unsigned
	View the present value of the limit sensor.			60	integer
play
					R
[SLA]	Limit High Set Point	0 to 220°C (32 to 428°F)	200°C (392°F)		unsigned
[SLA]	Set the high process value that will trigger			43	integer
	the limit.				RWE
[HtA]	High Temperature Alert Value	1 to 99°C (2 to 178°F)	20°C (36°F)		unsigned
[HtA]	The High Temperature Alert occurs when			35	integer
	the process variable exceeds the set point by				RWE
	more than the value set here.
Note:					R: Read
All values above 999 will be rounded off to fit in the three-character display. Full values can be					W: Write
read with other interfaces.					E: EEPROM

Note:

The EHG SL10 does not support Modbus function code 16 (0x10) Write Multiple Registers. Parameter values must be written individually with function code 6 (0x06) Write Single Registers.

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EHG SL10 User’s Guide

				Modbus	Data Type
Display	Parameter Name & Description	Range	Default	Relative	& Read/
				Address	Write
[ltA]	Low Temperature Alert Value	5 to 99°C (9 to 178°F)	20°C (36°F)		unsigned
[LtA]	The Low Temperature Alert occurs when the			36	integer
	process variable is below the set point by				RWE
	more than the value set here.
[Cnt]	Control Mode Select	[onF] On-Off (2)	on-off		unsigned
[Cnt]	Select a control method.	[PId] PID (3)		42	integer
					RWE
[HyS]	On-Off Hysteresis	3 to 28°C (5 to 50°F)	3°C (6°F)		unsigned
[HyS]	Set the how far below the set point the tem-			41	integer
	perature can drop before the heater turns				RWE
	on.
[`Pb]	Proportional Band	0 to 68°C (0 to 122°F)	0°C or 0°F		signed in-
[ Pb]	Set the proportional band in temperature			37	teger
	units.				RWE
[Int]	Integral	0 to 999	0		signed in-
[Int]	Set the integral value in minutes per repeat.			38	teger
					RWE
[dEu]	Derivative	0 to 999	0		signed in-
[dEv]	Set the derivative value in minutes.			39	teger
					RWE
[`Ct]	Cycle Time	5 to 60	10		unsigned
[ Ct]	Set the cycle time in seconds.			40	integer
					RWE
[Abt]	Ambient Temperature	0 to 106°C (0 to 190°F)	43°C (77°F)		unsigned
[Abt]	View the ambient temperature.			24	integer
					R
[Adr]	Modbus Device Address	1 to 247	1		unsigned
[Adr]	View and or change the present Modbus			15	integer
	address.				RWE
[bAU]	Modbus Baud Rate	[`96] 9,600 (15)	9,600		unsigned
[bAU]	Select the communication speed.	[192] 19,200 (16)		16	integer
		[384] 38,400 (17)			RWE
[tU`]	Temperature Units	[``F] °F (4)	°C		unsigned
[tU ]	Select the temperature scale.	[``C] °C (5)		17	integer
					RWE
[rpp]	Restore Programmed Parameters	[yes] Yes	No	- - - -	- - - -
[rPP]	Restore factory default settings.	[`no] No
[bru]	Base Release Version	0 to 9999			unsigned
[brv]	View the controller’s base release version.		- - - -	48	integer
					R
[bPu]	Base Prototype Version	0 to 9999			unsigned
[bPv]	View the controller’s base prototype version.		- - - -	49	integer
					R
[bbu]	Base Build Version	0 to 9999			unsigned
[bbu]	View the controller’s base build number.		- - - -	50	integer
					R
[dru]	Display Release Version	0 to 9999			unsigned
[drv]	View the interface’s release version.		- - - -	11	integer
					R
Note:					R: Read
All values above 999 will be rounded off to fit in the three-character display. Full values can be					W: Write
read with other interfaces.					E: EEPROM

Note:

The EHG SL10 does not support Modbus function code 16 (0x10) Write Multiple Registers. Parameter values must be written individually with function code 6 (0x06) Write Single Registers.

Watlow Controls

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EHG SL10 User’s Guide