Delta DVP series Relevant Instructions, Adjusting D/A Conversion Curve, Program Example

The adjustable range of voltage: -4V ~ +20V (-1,600LSB~ +8,000LSB)

The adjustable range of current: -8 mA ~ +40 mA (-1,600LSB~ +8,000LSB)

4.2 Program Example

Example 1: Set the OFFSET value of CH1as 0V (= K0LSB) and GAIN value as 2.5V (= K1,000LSB).

Relevant Instructions

Please note that: GAIN value – OFFSET value = +400LSB ~ +6,000LSB (voltage or current). When GAIN – OFFSET is small (steep oblique), the resolution of output signal will be finer and variation on the digital value will be greater. When GAIN – OFFSET is big (gradual oblique), the resolution of output signal will be rougher and variation on the digital value will be smaller.

7.CR #30: Error status value (See the table below)

M1002		K1	K1	H10	K1
	TO
	TO	K1	K33	H0	K1
X0		K1	K18	K0	K1
	TO

Write H’10 into CR#1 of analog output module No.1 and set CH1 in mode 0 (voltage output 0V

~+10V) and CH2 in mode 2 (current output 4mA ~ +20mA).

Write H’0 into CR#33 and allow OFFSET/GAIN tuning in CH1 ~ CH4

API		F R O M			Read CR data in special modules
78	D			P
Instruction			: No. of special module (m1 = 0 ~ 7)		: CR# in special module to be read
Explanation			: Device for storing read data		: Number of data to be read at a time

Error status

Abnormal power supply Incorrect analog input value

Content	b15 ~ b8 b7	b6	b5	b4	b3	b2	b1	b0
K1(H’1)	0	0	0	0	0	0	0	1
K2(H’2)	0	0	0	0	0	0	1	0

TO K1 K24 K1000 K1

When X0 goes from Off to On, write the OFFSET value K0LSB into CR#18 and the GAIN value K1,000LSB into CR#24.

Read CR#24 of special module No.0 into D0 and CR#25 into D1. Only 2 groups of data is read at a time (n = 2).

Program

ExampleX0

Incorrect mode setting

K4(H’4) 0 0 0 0 0 1 0 0

Example 2: Set the OFFSET value of CH2 as 2mA (= K400 LSB) and GAIN value as18mA (= K3,600LSB).

FROM K0 K24 D0 K2

OFFSET/GAIN error Hardware malfunction Abnormal digital range Incorrect average times setting

Instruction error

K8(H’8)	reserved	0	0	0	0	1	0	0	0
K16(H’10)		0	0	0	1	0	0	0	0
K32(H’20)		0	0	1	0	0	0	0	0
K64(H’40)		0	1	0	0	0	0	0	0
K128(H’80)		1	0	0	0	0	0	0	0

M1002

TO	K1	K1	H18	K1
TO	K1	K33	H0	K1

X0

TO K1 K19 K400 K1

Write H’18 into CR#1 of analog output module No.1 and set CH1 in mode 0 (voltage output 0V

~+10V) and CH2 in mode 3 (current output 0mA ~ +20mA).

Write H’0 into CR#33 and allow OFFSET/GAIN tuning in CH1 ~ CH4

When X0 goes from Off to On, write the

API		T O			Write CR data into special modules
79	D			P
Instruction			: No. of special module (m1 = 0 ~ 7)		: CR# in special module to be written

Note: Each error status is determined by the corresponding bit (b0 ~ b7) and there may be more than 2 errors occurring at the same time. 0 = normal; 1 = error

TO K1 K25 K3600 K1

OFFSET value K400LSB into CR#19 and the GAIN value K3,600LSB into CR#25.

Explanation : Data to be written into CR : Number of data to be written at a time

8.CR#31: The setting of RS-485 communication address (Range: 01 ~ 255, default = K1).

9.CR#32: The setting of RS-485 communication speed. b0: 4,800bps; b1: 9,600bps (default); b2: 19,200bps; b3:

38,400bps; b4: 57,600bps; b5: 115,200bps; b6 ~ b13: reserved; b14: high/low bit exchange of CRC checksum

(only valid in RTU mode); b15 = 0: ASCII mode; b15 = 1: RTU mode. ASCII data format: 7-bit, Even bit, 1 stop

bit (7, E, 1); RTU data format: 8-bit, Even bit, 1 stop bit (8, E, 1).

10.CR#33: For authorizations on some internal functions, e.g. OFFSET/GAIN tuning. The latched function will store the output setting in the internal memory before the power is cut off.

11.CR#34: Firmware version of the model.

12.CR#35 ~ CR#48: Parameters for system use.

13.CR#0 ~ CR#34: The corresponding parameter addresses H’4032 ~ H’4054 are for users to read/write data by RS-485 communication. When using RS-485, the user has to separate the module with MPU first.

a. Communication baud rate: 4,800/9,600/19,200/38,400/57,600/115,200bps

b.Modbus ASCII/RTU communication protocols: ASCII data format (7-bit, Even bit, 1 stop bit (7, E, 1)); RTU data format (8-bit, Even bit, 1 stop bit (8, E, 1)).

c.Function: H’03 (read register data); H’06 (write 1 word datum to register); H’10 (write many word data to register)

d.Latched CR should be written by RS-485 communication to stay latched. CR will not be latched if written by MPU through TO/DTO instruction.

Adjusting D/A Conversion Curve

4.1 Explanation

Voltage Output Mode

Trial Operation & Troubleshooting

™LED Display

1.When the module is powered for the first time, POWER LED will be on. After ERROR LED being on for 0.5 second, D/A LED will start to flash.

2.When the power supply is normal, POWER LED will be on and ERROR LED should be off. When the power supply is less than 19.5V, ERROR LED will keep being on until the power supply is higher than 19.5V.

3.When controlled by RS-485, the RS-485 LED will flash after receiving RS-485 instruction.

4.When the input or output value exceeds the upper bound or falls below the lower bound after conversion, ERROR LED will flash.

™Program Example

M1000			FROM	K1	K0	D0	K1
			CMP	H6401	D0	M0
M1013
			INC	D100
			ADD	D101	K5	D101
=	K4000	D100	RST	D100

Use 32-bit instruction DTO to write the content in D11 and D10 into CR#7 and CR#6 of special module No.0. Only 1 group of data is written in at a time (n = 1).

Program

ExampleX0

DTO K0 K6 D10 K1

Operand rules

1.: The No. of special modules connected to PLC MPU. No. 0 is the module closest to te MPU. Maximum 8 modules are allowed to connected to a PLC MPU and they will not occupy any I/O points.

2.: CR#. CR (control register) is the 49 16-bit memories built in the special module, numbered in decimal as #0 ~ #48. All operation status and settings of the special module are contained in the CR.

3.FROM/TO instruction is for reading/writing 1 CR at a time. DFROM/DTO instruction is for reading/writing 2 CRs at a time.

Higher 16 -bit	Lower 16- bit
CR #10	CR #9	Designated CR number

4.Number of groups “n” to be transmitted: n = 2 in 16-bit instructions and n = 1 in 32-bit instructions mean the same.

	Designated device	Designated CR	Designated device Designated CR
	D0	CR #5	D0	CR #5
Remarks	D1	CR #6	D1	CR #6
	D2	CR #7	D2	CR #7
	D3	CR #8	D3	CR #8

	10V	Mode 1
output			Mode 0
	6V
Voltage		GAIN
	5V
	2V
		+2,000	+4,000
		OFFSET

Digital input

Current Output Mode

	20mA		Mode 2
output	12mA			Mode 3
t		GAIN
ren	10mA
Cur
	4mA
	0		+2,000	+4,000
		OFFSET

Digital input

CR#1 mode 0

CR#1 mode 1

GAIN

OFFSET

GAIN - OFFSET

CR#1 mode 2

CR#1 mode 3

GAIN

OFFSET

GAIN - OFFSET

GAIN = 5V (2,000LSB)

OFFSET = 0V (0LSB)

GAIN = 6V (2,400LSB)

OFFSET = 2V (800LSB)

The voltage output value when the digital input value = K2,000

Range: -4V ~ +20V (-1,600LSB~ +8,000LSB)

The voltage output value when the digital input value = K0

Range: -5V ~ +5V (-2,000LSB~ +2,000LSB)

Range: +1V ~ +15V (+400 LSB ~ +6,000 LSB)

GAIN = 12mA (2,400LSB)

OFFSET = 4mA (800LSB)

GAIN = 10mA (2,000LSB)

OFFSET = 0mA (0LSB)

The current output value when the digital input value = K2,000

Range: -8mA ~ +40mA (-1,600LSB~ +8,000LSB)

The current output value when the digital input value = K0

Range: -10mA ~ +10mA (-2,000LSB~ +2,000LSB)

Range: +2mA ~ +30mA (+400 LSB ~ +6,000 LSB)

	= K4000 D101	RST	D101
M1		TO	K1	K1	H10	K1
M1		TO	K1	K6	D100	K2
		END

Read the model name from K1 and see if it is DVP04DA-H2: H’6401.

D100 increases K1 and D101 increases K5 every second.

When D100 and D101 reach K4,000, they will be cleared as 0.

See if the model is DVP04DA-H2 when M1 = On. If so, set up output mode: CH1 in mode 0; CH2 in mode 2.

Write the output settings of D100 and D101 into CR#6 and CR#7. The analog output will change with the changes in D100 and D101.

D4	CR #9	D4	CR #9
D5	CR #10	D5	CR #10
16-bit instruction when n=6		32-bit instruction when n=3

M1083 for switching instruction modes in EH2 series models

1.When M1083 = Off, during the execution of FROM/TO instruction, all external or internal interruption subroutines will be forbidden. The interruptions are allowed only after FROM/TO instruction finishes its execution. FROM/TO instruction can also be used in an interruption subroutine.

2.When M1083 = On and an interruption signal occurs during the execution of FROM/TO instruction, the interruption will be processed first (with a 100us delay) and the execution of FROM/TO will be stopped. After the interruption subroutine finishes its execution, the program will jump to the next instructio of FROM/TO. FROM/TO cannot be used in an interruption subroutine.

The content of this instruction sheet may be revised without prior notice. Please consult our distributors or download the most updated version at http://www.delta.com.tw/industrialautomation