Varian Turbo-V 81 PCB 24 Vdc Notice De Mode D'emploi page 61

•
Parameter Number: it points out to the controller
about which parameter the master wants to operate,
and about the kind of operation (read/write).
consists of:
1 2
0= always 0
parameter
reading
1 =
parameter
writing
•
Data Field Length: it points out the next field length
in characters. In this protocol the possible
combinations are:
02 = parameter reading request
06 = parameter, writing
•
Data: in this controller it can be:
"=?": in the case of parameter reading request
"000000" or "111111": in the case of YES/NO
command or parameter writing
a six numeric character string 0 to 9
pointing out the value of a configuration parameter
or an analog measure
a six character string pointing out an error
•
Checksum: it is the sum of the string ASCII values
up to the first character of the checksum with a 8 bit
cutting-off and a conversion to a decimal number.
•
CR: < 0xD>
All the fields are set on the right with the "0" character
used as filling character.
When a string with an address number equal to the
card one (001 in this case) is received, the controller
answers as detailed in the following:
•
in the case of a parameter request with a string
having the same size described before, but the first
character of the "Parameter Number" field set to 1.
Example for a low speed status request:
Master to Controller:
0010000202= ?097< 0xD >
Controller to Master:
0011000206111111016< 0xD >
where " 111111" is for low speed status ON
•
in the case of a parameter writing, with a string
including the parameter value that has been set out.
Example for a low speed status ON writing:
Master to Controller:
0011000206111111016< 0xD >
Controller to Master:
0011000206111111016< 0xD >
3 4
000 to 299 = commands
300 to 699 = status
700 to 999 = parameter
•
in the case of a string with a length greater than 40
characters, with:
It
Controller address
5
•
in the case of a wrong checksum, with:
Controller address
•
in the case of a parameter number not present,
with:
1 0
control.
address
•
in the case of an out-limit value, with:
1 0
control.
address
•
in the case of an attempt of writing a logic
parameter with a value not equal to " 000000" or "
111111", or when the parameter is a read only one,
with:.
1 0
control.
address
•
in the case of a time between two characters
greater than 1 second, with:
Controller address
Information obtained by the serial interface are listed in
the following table where the column "TYPE" points out
a logic variable with "D" (allowed values "000000" or
"111111") and a numeric variable with "N".
Variables with the first character of "Parameter
Number" equal to X can be either written or read.
Variables with that character equal to "0" can be only
read, equal to "1" can be only written.
57
TECHNICAL INFORMATION
N A
N A
0 6 N O - D E F
param.
address
0 6 - R A N G E
param.
address
0 6 - L O G I C
param.
address
N A
87-900-121-01 (B)
K CR
K CR
check- CR
sum
check- CR
sum
check- CR
sum
K CR