Edwards STP-iX455 User Manual

STP-iX455/iXL455 Series Instruction Manual
9-11
Operation
Transmission frame when data is transmitted to two blocks (message is more than 256
characters and less than 512 characters):
Designate the control command (the 1st block) on the PC.
PC→SIM
Stx 0 0 1 Sp CHR C
1
C
253
Etb LRC
SIM→PC
Ack or Nak
Next, the preceding SIM->PC character is "Ack", the PC continues instructing the
control command (the 2nd block).
PC→SIM
Stx 0 0 2
C
254
C
n
Etx LRC
SIM→PC
Ack or Nak
Always assign less than 510 characters (n< 510) to the parameter so that the message is
less than 512 characters.
Then, the preceding SIM->PC character is "Ack", the instructed control command is
executed and the SIM returns the following response.
PC→SIM
Ack or Nak
SIM→PC
Stx 0 0 1 # or ! Etx LRC
The PC transmits "Ack" or "Nak"; then transmits the next command if necessary.
9.3.4 Query Command (in the RS232/RS485 Single Point Connection)
A query command is used to read the pump operation state and setting values. The first
character of the query command in the RS232/RS485 single point connection is "?" (HEX
code "3F"), and succeeding characters are ASCII characters corresponding to the
respective function code and parameter.
? CHR C
1
C
2
C
n
CHR: Function code character, C
1
to C
n
: Parameter
Parameter (from C
1
to C
n
) serves as 16 bits signed hexadecimal value coded ASCII text.
When a message (a space character, a function code, and parameter) exceeds 255
characters, input "?" and CHR only to the top transmission block (the first transmission
block of the transmission frame). It is not necessary to input them to the 2nd and
succeeding transmission blocks.
The SIM returns the acknowledgment response character "#" when the query command
is processed normally. If not, the SIM returns the non-acknowledgment response
character "!" and 3 characters of the non-acknowledgment code are added to "!".

Edwards STP-iX455 Specifications

General

Brand	Edwards
Model	STP-iX455
Category	Water Pump
Language	English