APC MGETM GALAXYTM 6000 User Manual download pdf (Page 11)

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Function 6: writing a word

request

slave address

word address

CRC 16word

1 byte 1 byte 2 bytes2 bytes 2 bytes

response

slave address

word address

CRC 16word

The response is echoed acknowledging that the word sent has been received.

example

06 08 10 10 00

8A 2E

Writing the value 1000 into the word location 810H of slave at address 50H

Function 8: reading error diagnosis counters

Each slave manages a set of nine

16 bit counters for error diagnosis

(see opposite):

slave address

CRC 16

1 byte

1 byte 2 bytes 2 bytes 2 bytes

- request / response:

- the slave must echo 00 XYZT

the request

- reset error 0A 0000

diagnosis counter

- read the total number of:

received frames with CRC error (CNT 1) 0B XXXX

received frames with CRC error (CNT 2) 0C XXXX

number of exception responses (CNT 3) 0D XXXX

frames addressed to the station (CNT 4) 0E XXXX

(not including broadcast)

broadcast requests received (CNT 5) 0F XXXX

number of NACK responses (CNT 6) 10 XXXX

unit not ready responses (CNT 7) 11 XXXX

illegal characters (CNT 8) 12 XXXX

X, Y, Z, T are user

defined (transmission

parameters)

requests:

XXXX equals 0000

response:

XXXX is the counter

value

data

sub-function

code

JBUS protocol (continued)

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 37 38

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APC MGETM GALAXYTM 6000 User Manual Page 11

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