Carrier 040-420 4-20mA, Example 8 - Setting Time of Day and Day of Week, Demand Limiting

MAX DEMAND KIMAX) = 90

DEMAND LlMlT SIGNAL (4-20MA INPUT)

Fig. 8 - 4-20 mA

Reading and Changing Time Displav - Time is entered and displayed in 24-hour time. The day of the week is en- tered as a number.

1 = Mon, 2 = Tue, 7 = Sun, etc.

m Kev is used as the colon when entering time. See Ex-

I

ample 8.

Example 8 - Setting Time of Day and

Day of Week

KEYPAD		DISPLAY	COMMENTS
ENTRY		RESPONSE
			Time	display sub-
	TIME		function of set point
			function
		MON 1600	Current setting is
			Monday, 4:00 p.m
			New setting of
		TUE 13 05	Tuesday, I:05 p m
			is entered
			and	displayed
		JAN 01 90	Current date is
			Jan.	1, 1990
			New setting
		APR 15 90	April	15, 1990
			is entered
			and	displayed

SERVICE FUNCTION - This function allows the techni- cian to view and input configuration data. Factory config- uration data, field configuration data and service configu- ration data may be viewed or entered through the keypad and display module. See Table 9 for a complete listing of configurable items. Whenever a processor module is re- placed in the field, the complete list of configuration codes must be entered.

Demand Limiting

Logging On/Longing Off - The service function is pass- word protected. Therefore, to gain entry to this function,

this password must be entered. Pressing mlrim m

allows the technician to view, change or enter configura- tion codes. To log off, perform the following keystrokes:

m biF]H ~The service function is once again pass- word protected.

Software Information - Fi F/VI displays the version

number of the software that resides in the processor mod-

ule. Press m a second time to display the language op- tions that are available in the field configuration group.

T h e r;lF[ a n d2 SRVCfirIsu uricb f ionst are summarized in

Table 11 s

Factorv Configuration Codes -mF[ allows entry into

the factory configuration subfunction. Under this subfunc- tion, there are 6 groups of configuration codes that are down- loaded at the factory. Each group is made up of 8 digits. If processor module is replaced in the field, these 6 groups of configuration codes must be entered through the keypad and display module. Factory configuration codes (groups 1 through

6)that apply to the particular Flotronic’” II chiller being serviced are found on a label diagram located inside the control box cover. See Table 12 for a summary of factory configuration subfunction keystrokes.

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