Rockwell-automation 1746-QV,D17466.18 OPEN-LOOP VELOCITY CONTL Manual de usuario descargar pdf (Pagina 13)

3–3

Setting Up the Software

Publication

1746-6.18 April 1998

5. Enter values in the G file:

If the module was listed: If the module was not listed (you entered the ID):

You get the G–file Setup screen.

Enter data from the table, below.

You get the following display, shown in decimal radix.

Enter a value in each word as shown, next.

G–file display for unlisted module (shown in decimal radix):

Ge:0 2056 0 0 0 0 0 0

Enter a value at each G-file word address and press [ENTER].

Then cursor to the next word address and repeat. For example:

Ge:0 2056 893 730 12 1200 –32768 0

We used values from the ladder logic example (appendix B).

You will want to use G-file values that suit your application:

Word: Function of G-file Word: Range: Description of G-file Word or Bit: Example:

0 Reserved. Do NOT use. n/a The processor stores a code for the 1746-QV module. 2056

words 1 & 2 refer to the gradient or transducer calibration value stamped on the name plate on the transducer housing.

1 LDT calibration: upper 3 digits

800-999 ms/inch

For example: To enter an LDT calibration of 8.9373,

u e deci al radi and enter 893 in word 1 and 73 in word 2.

893

2 LDT calibration: lower 3 digits

000-999 ms/inch

For e a ple o enter an calibration of 8.9373

use decimal radix and enter 893 in word 1 and 730 in word 2.

730

3 Full-scale length (L) of LDT 2vLv160 inch Enter the length of the LDT (160 inches max). 12

4 Full-scale count (C) 2vCvLx100 Typically C = L x 100.

Position Data (I:e.1) = C/(L x 100)

LDT Calibration

1200

5 Configuration Bits

bits 0-12 Set to zero.

–32,768

bit

1 = 1

Configuration Bit

15 14 13 12-0 Equivalent V

alue

0 1 0 0

+16,384

1 0 0 0

–32,768

1 1

–16

384

bit 13 0 = output maintained during LDT fault while running profiles and

during SLC mode change

1 = output resets for LDT fault and SLC mode change

–32,768

(bit

15 = 1

for position

increases

towards

head

1 1

–16

384

0 1 1 0

+24,576

bit 14 Type of LDT: 0 for RPM, 1 for DPM

toward

LDT head)

bit 15 0 = position data increases when moving away from LDT head

1 = position increases when moving toward LDT head

6 Preset Reference –32,768 to +32,767 Typically zero or home reference value. 32,767 = 327.67 inches. 0

Examples of Full-scale Count Values

LDT Physical

Length

No. of

Recirculations

Resolution

Full-scale

Length (L)

Full-scale

Counts (C)

from 160” to 2” 1 0.01 L (160” to 2”) L x 100

16” 2 0.01 160 8000

16” 4 0.01 160 4000

16” 10 0.001 160 16000

Important: The module checks for invalid data such as out of

range values or the setting of reserved bits 0-12. You can clear a

data-entry configuration error only by re-entering a corrected value.

6. Save when done

Click OK. Click OK. Close window.

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Rockwell-automation 1746-QV,D17466.18 OPEN-LOOP VELOCITY CONTL Manual de usuario Pagina 13

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