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RS 232 OPTION
RS 232 Installation
To install it, proceed as follows:
Switch off the power and disconnect the power
•
cord.
Unscrew the cover screws and remove the cover.
•
On rear panel, remove the J5 connector plate.
•
Insert the flat cable through the rear panel and plug
•
it into the socket located on the internal board of the
controller.
Install and tighten the connector screws.
•
Replace the cover.
•
RS 232 connector installation
RS 232 Communication Descriptions
Communication format:
8 data bit
•
no parity
•
1 stop bit
•
The baud rate is programmable via front panel from
•
600 to 9600 baud. The controller is factory-set for
9600 baud operation.
When a baud rate of 2400, 4800, 9600 baud is used,
the requested information from Host to controller must
be sent with a minimum interval of 1 second to avoid
the controller hang-up.
NOTE
Communication protocol:
Host = Master
Controller = Slave
The communication is performed in the following way:
Communication RS 232 serial port connections
Minimum connection configuration
Request is an ASCII character identifying the action that
must be performed by the controller or the requested
information.
Allowed ASCII characters:
"A" = START
•
"B" = STOP
•
"C" = Low Speed ON
•
"D" = Low Speed OFF
•
"E" = Request for operational parameters
•
"F" = Pump times zeroing
•
"G" = Parameters reading
•
"H" = Parameters writing
•
"I" = Request for operating status
•
"J" = Request for numerical reading
•
"K" = Request for counters reading.
•
CRC corresponds to the sum (with inverted sign) of all the
preceding bytes.
e.g., the START command "A" in ASCII
inverted it will be: FF + 1 - 41 = BF.
56
TECHNICAL INFORMATION
code = 41;
87-900-908-01 (C)
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