Emerson FPC user manual Ascii interface default parameters, RS-232 Ascii port customer commands

Operating Instructions

To Set Unit Clock - To set the clock from the unit front panel, simultaneously press the Scan and Hold membrane switches while the time and date screen is displayed on the LCD. A cursor should appear on the selected time and date field. Use the Scan switch to increment the highlighted field and the Hold switch to decrement the highlighted field. Use the Silence push button to select the next time and date field. The time can be displayed in AM/PM or 24-hour format. Simultaneously press the Scan and Hold switches to exit the clock set screen.

RS-232 ASCII Communications Port - Units with power monitoring are equipped with an isolated RS-232 ASCII Communications Port, which allows access to unit monitored parameters and alarm information. The RS-232 port connections are located on the low voltage control terminal strip inside the unit. See typical control wiring in Figure 16.

The ASCII interface default parameters are shown in Table 15.

Table 15 ASCII interface default parameters

Parameter	Default
Interface	RS-232 using EIA voltage levels
Baud rate	9600
Parity	None
Data bits	8
Stop bits	1
Terminator	<CR>
Hand shaking	Not supported
Structure	Half-duplex
Echo	OFF
Change to receive after transmit	1.28 msec
Minimum delay to transmit after receive	120 µsec
Maximum response time turn around	300 msec
Maximum response completion time	500 msec
Minimum delay between commands	500 msec
Maximum intercharacter delay	12.5 msec

The ASCII port uses a Query-Response Format.

Table 17 shows the list of available customer commands. Only one command is serviced at a time. Valid commands are terminated with a carriage return [0Dh]. Commands are accepted in upper or lower case. Responses are in upper case, terminated with a line feed [0Ah] and carriage return [0Dh].

Table 16 RS-232 ASCII port customer commands

Command	Description	Typical Response
Time? <CR>	Unit: Time	03:40:37A<LF><CR>
Date? <CR>	Unit: Date	05-15-97<LF><CR>
UID? <CR>	Unit ID	Unit_No._PDU_21B____<LF><CR>
kVA? <CR>	Nominal kVA	0150<LF><CR>
V? <CR>	Nominal L-L Voltage	0208<LF><CR>
SS1? <CR>	System Information	UNIT_MODEL_NUMBER___SERIAL NUMBER_______
	(20-character fields	SITE_ID_NUMBER______TAG_NUMBER__________<LF><CR>
	with comma separators)
SA? <CR>	Number of Active Alarms	02, OUTPUT_OVERVOLTAGE__05-15-97,01:25:30A
	(20-character alarms	OUTPUT_OVERCURRENT__05-15-97,01:27:46A<LF><CR>
	with time stamp)
UPMD?	Monitored Parameters	0484,0485,0483,0210,0212,0211,0121,0122,0121,0068,
<CR>	(32 comma-separated	0085,0120,0131,0018,0030,0092,0033,0600,0038,0041,
	data fields—see	0043,0549,0632,0599,0000,1528,0018,0019,0020,0045,
	Table 17 for descriptions	0047,0049,0044<LF><CR>
	of field positions)

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