Varian 869-8933 Manual De Instrucciones página 66

The addressed SLAVE will respond with an AN-
SWER whose structure depends from the MESSAGE
type.
When the MESSAGE is a reading command, the
SLAVE will respond transmitting a string with the
same structure of the MESSAGE.
NOTE
Using the RS 485 interface, the message structure
remains identical to the one used for the RS 232
interface, the only difference being that the value
assigned to the ADDRESS <ADDR>
The controller can answers with the following re-
sponse types:
TYPE LENGTH VALUE
Logic 1 byte
Numeric 6 bytes
Alphanumeric 10 bytes
ACK 1 byte
NACK 1 byte
Unknown
1 byte
Window
Data Type
1 byte
Error
Out of Range 1 byte
Win Disabled 1 byte
Examples:
Command: START
Source: PC
Destination: Controller
02 80 30 30 30
STX ADDR WINDOW
Source: Controller
Destination: PC
02 80 06 03 38
STX ADDR ACK ETX
DESCRIPTION
After a read instruction
-
of a logic window
After a read instruction
-
of a numeric window
After a read instruction
- of an alphanumeric
window
The command execu-
(0x6) tion has been success-
fully completed
The command execu-
(0x15)
tion has been failed
The specified window
(0x32) in the command is not
a valid window
The data type specified
in the command (Logic,
Numeric or Alphanu-
(0x33)
meric) is not accorded
with the specified Win-
dow
The value expressed
during a write com-
(0x34)
mand is out of the
range value of the
specified window
The specified window
is Read Only or tempo-
rarily disabled (for ex-
(0x35)
ample you can't write
the Soft Start when the
Pump is running)
31 31 03 42
WR ON ETX CRC
35
CRC
Command: STOP
Source: PC
Destination: Controller
02 80 30
STX ADDR
Source: Controller
Destination: PC
02 80 06
STX ADDR ACK ETX
Command: SOFT-START (ON)
Source: PC
Destination: Controller
02 80 31
STX ADDR
Source: Controller
Destination: PC
02 80 06
STX ADDR ACK ETX
Command: SOFT-START (OFF)
Source: PC
Destination: Controller
02 80 31
STX ADDR
Source: Controller
Destination: PC
02 80 06
STX ADDR ACK ETX
33
61
TECHNICAL INFORMATION
30 30 31 30
WINDOW WR OFF ETX
03 38 35
CRC
30 30 31 31
WINDOW WR ON ETX
03 38 35
CRC
30 30 31 30
WINDOW WR OFF ETX
03 38 35
CRC
87-900-980-01(B)
03 42 32
CRC
03 42 32
CRC
03 42 33
CRC