Delta Electronics DVP-F2FR instruction sheet Instruction Explanation, Api, Application Example

CR NO.					Latched
		Attribute	Factory			Mode	Function explanation
HW	LW		setting
							V1.00 version.
		#35~#49					Reserved
	#50	R	K51	°		1,3	The index of F0 record value (record the number from CR51~130)
#51~#130		R	K0	°		1,3	F0 record value (each value occupy 2 group CR)
	#131	R	K132	°		1,3	The index of F1 record value (record the number from CR132~211)
#132~#211		R	K0	°		1,3	F1 record value (each value occupy 2 group CR)
		#222~#255					Reserved

The usage of CR varies based on operation mode. Please follow the table above to read or write CR. In column Attribute, ‘*” means writing is allowed when frequency measurement card is not working.

When the writing value is out of available range, the value of upper/lower bound shall prevail to write once the value is out of upper/lower bound.

The CR28 and CR29 are the time-out setting for F0 and F1. When setting them to a non-zero value in mode 1, it will monitor the signal input from F0 or F1 and start a time-out counting. If no signal detected in F0 and F1 with the time-out counter reaching the setting, it will clear the CR10~CR11 or CR12~CR13 and inform the PLC by I180 interrupt. Moreover, when CR28 and CR29 are set to zero, the time-out counter will not work anymore.

CR50~CR211 will record the value according to the operation mode. Explanation as follows:

	Mode 1	Mode 2	Mode 3
CR51~CR130	To record F0 pulse interval (CR10,	N/A	N/A
	CR11)
CR132~CR211	To record F1 pulse interval (CR12,	N/A	To record F1 pulse interval
	CR13)		(CR25, CR26

The index number of each record is plus 2 for CR50 and CR131 after both registers record on next. Once the index number reaches to the maximum, it will back to the 1st index number.

It takes about 125us for instruction FROM/TO to read or write a CR of the frequency measurement card. One more read/write item of CR, 30us more for register.

5					INSTRUCTION EXPLANATION
5.1 Instruction Explanation for Frequency Measurement Card
API		FROM				Read Special Module CR Data
78	D			P
Instruction
Explanation			: Number of special module (m1=0~7). Number of frequency measurement card, m1=200.

: Number of CR of special module that will be read.

: Location to save reading data.

: Data number of reading one time.

API		TO			Special Module CR Data Write In
79	D			P
Instruction
Explanation			: Number of special module (m1=0~7). Number of frequency measurement card, m1=200.

: Number of CR of special module that will be read.

: Location to save writing data.

: Data number of reading one time

5.2 Explanation of special D, M and Interrupt:

Device	Explanation	Range
D1034	Mode setting of frequency measurement card	D1034 = K1~K3 (Mode 1~Mode 3)
M1019	Flag of mode setting
I180	Frequency measurement card trigger
	interrupt

After PLC run at the first scan time, PLC will detect flag M1019 is ON or OFF. If M1019 is ON, PLC will modify the frequency measurement card’s operation mode based on D1034 setting. Program example as follow is operation mode 1:

M1002

MOV K1 D1034

SET M1019

PLC can use M1019 (flag of operation mode setting for frequency measurement card) and D1034 (flag of operation mode setting for frequency measurement card) to set operation mode 1 (measurement of pulse interval) and operation mode 2 (measurement of pulse number) to support Interrupt function I180.

6 APPLICATION EXAMPLE

6.1 Pulse Interval Length Measurement

Following the program example of setting operation mode 1 (D1034, M1019) for frequency measurement card. For F0 and F1, set the time unit of sampling rate is 100ns (D7, D8) and the sampling record number as 20 (D3, D4). Moreover, I180 will be triggered when F0 or F1 detects a rising or falling edge. PLC can read CR9 via instruction FROM to decide which channel to detect the signal.

			EI
M1002			MOV	K1	D1034
			SET	M1019
			MOV	K20	D3
			MOV	K20	D4
			MOV	K2	D7
			MOV	K2	D8
			TO	K200	K3	D3	K6
M1013				K200	K50	D50
			FROM				K41
			FROM	K200	K131	D131	K41
			FEND
M1000
I 180			FROM	K200	K9	D9	K11
&	D9	K1	DMOV	D10	D300
&	D9	K2	DMOV	D12	D300
			IRET
			END

6.2 High-speed Counter

The setting for the following program example:

1.Operation mode: Mode 1.

2.Counting method: Pulse/Direction.

3.Set M0=ON to start counting.

M1002	K2	D1034
MOV
SET	M1019
MOV	K0	D22
TO	K200	K22	D22	K1
M1013
FROM	K200	K20	D20	K3
M0
TO	K200	K24	K1	K1
END

6.3 Pulse Number Capture

The following program example is Mode 3 for frequency measurement card. Whenever frequency measurement card detects the rising-edge in F1, it will trigger the Interrupt I180 of PLC. When PLC execute Interrupt I180, it will read the content of CR25, 26 of frequency measurement card via instruction FROM.

	EI
	M1002	K3	D1034
	MOV
	SET	M1019
	MOV	K20	D4
	TO	K200	K4	D4	K1
	M1013		K131	D131	K40
	FROM	K200
	FEND
	M1000	K200	K25	D25	K2
I 180	FROM
	IRET
	END

6.4Differential Input Interface (please refer to the following wiring method)

	+24VDC
		4.7K
	A+
	A-	4.7K	F0
Differential	470
output	NPN Tansistor
	ON MMBT4401LT1G
	+24VDC
		4.7K
	B+
	B-	4.7K	F1
Differential	470
output	NPN Transistor
	ON MMBT4401LT1G

Suggestion: if it is necessary to measure the input signal of frequency measurement card, please connect one clip of the oscillograph probe to either terminal A- or B- and the other clip of the oscillograph probe to the ground .

7 INSTALLATION AND MAINTENANCE

Wiring Method for Frequency Measurement Card
+24VDC
	Isolating cable
		4.7K
	A+
Open collector	A-	4.7K	F0
output
+24VDC
	Isolating cable
		4.7K
	B+
Open collector	B-	4.7K	F1
output

There is a SDSP1 indication LED in the front end of the DVP-F2FR frequency measurement card. When power on the PLC MPU, the LED will light up (green). If the LED doesn’t light up with power on, it means that there is error with the card. Please power off the PLC and re-install the card again.

Before power on the system, please check A/B phase loop and make sure they connect to the input terminal with correct electrical level.