Parker Products COMPAX-M /-S (L) manual RS232 interface Valency *1, Msb Lsb, 360 450,5

Interfaces

RS232 interface

Valency: *1

215 214 ... 22 21 20.

Transmission sequence, e.g.: "84 4C MSB LSB".

*1 Negative numbers Negative numbers are represented in complement to two format. Creating the complement to two:

♦Determine bit combination of the positive numerical value.

♦Negate the binary value.

♦Add 1.

*2 Format You can generate this format from any number (as long as it has digits after the conversion decimal place) as follows.

Example: Number = 450.5

1.Multiply number by 224.

450.5 * 224 = 7 558 135 808.

2.7 558 135 808: convert into a hexadecimal number (if necessary into an integer first) =>0x00 01 C2 80 00 00 ≡ before decimal place, after decimal place ≡ MSB,.... LSB, MSB,.... LSB.

3.These bytes must now be entered into the commands in the sequence specified. The sequence of the bytes is reversed. Do not alter the sequence of

the bits.

This conversion also applies to negative numbers.

Examples of the number format of "xx xx xx xx xx xx"

	Number	MSB					LSB
	10	00	00	0A	00	00	00
	360	00	01	68	00	00	00
	450,5	00	01	C2	80	00	00
	-1	FF	FF	FF	00	00	00
		Digits before the decimal place			Digits after the decimal place
	The following string will be produced, e.g. for POSA 360.0:
	"88 41 00 00 00 68 01 00"
	Note: transfer all digits!
Start-up during	Note: when binary transfer is switched on, note the following.
binary transfer	Only create RS232 connection when participants are switched on or
	when participants are enabled, the RS232 can be re-initialized by COMPAX using
	Power on.

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