D-Series Syringe Pumps - Isco

D Series Syringe Pumps
Section 6 Serial Interface
Hexadecimal Format Using
NO MODULO
Step 1:
Step 2:
22FH = 52H + 33H + 30H + 34H + 53H + 54H + 4FH + 50H
FED1H = 100H 22FH
Step 3:
D1H = FED1H & offH
Step 4: Convert D1H = to ASCII (Hex) and put at end of
message.
Step 5: Put a “CR” (0DH) at the end of message for end of frame.
Decimal Format Using NO
MODULO
Step 1:
Step 2:
559 = 82 + 51 + 48 + 52 + 83 + 84 + 79 + 80
303 = 256 559
Step 3:
209 = 303 & 255
Step 4: Convert 209 into ASCII (Hex) and put at end of
message.
Step 5: Put a “CR” (13) at the end of message for end of frame.
The carriage return “CR” signifies end of frame.
The format for frames sent from the unit to the network controller
is as follows:
acknowledgement\message destination
\length\message\checksum\[CR]
All the parameters are as previously described except message
destination. Message destination is the 1-digit identification
number of the unit that the message is sent to.
An example of a typical data exchange is summarized below. For
illustration, we will assume the network consists of a computer
serving as a combination network controller and master. There
will be one slave unit; a Model 260D pump. Details on the pump
message format are in section 6.5. The computer will be unit #0,
and the pump will be unit #6.
Network Controller and Master Unit #0
[CR]1R 5D[CR]
Note
A [CR] must start the network. The controller is checking for
the presence of unit #1 but will get no response in 200 ms
because there is no unit 1.
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