CHAPTER 13 RS-485 COMMUNICATIONS

 Parameter write

CMND 51h

DATA

(n)

Sent from host controller

7

0

Memory type

See the table below.

Address (L)

Quantity (01h to 15h)

Address (M)

No.(01h to 99h)

Address (H)

01h

No. of written bytes (L)

(Designated No. x 6)

No. of written bytes (H)

00h

Parameter of

designated No.

Parameter of

designated No.

+ 1

Parameter of

designated No.

+ Designated

quantity - 1

* Designate addresses (L) and (M) in a BCD.

Example: 49 → 49h, 50 → 50h

Memory type

21h

22h

23h

Parameter

PA1_

PA2_

PA3_

Sent from servo amplifier

Memory type

Address (L)

Address (M)

Address (H)

7

0

See the table below.

Quantity (01h to 15h)

No.(01h to 99h)

01h

No. of written bytes (L)

(Designated No. x 6)

No. of written bytes (H)

STR1

STR2

00h

Status data

* If the entire data is correct, the data of the

designated quantity is written.

If an error is found, the following data is not

written.

Bit 6 of STR1 (data error) is turned on and the

number of data pieces actually written is sent

back.

Parameter of designated No. (6 bytes)

7

0

000

(Decimal point position)

Data sign

0: +, 1: -

(10th digit)

(9th digit)

(8th digit)

(7th digit)

(6th digit)

(5th digit)

(4th digit)

(3rd digit)

(2nd digit)

(1st digit)

* The data is a 10-digit BCD.

13

PC Loader Communications 13-55