CAS PDI Series, Manual

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8. RS-232C Interface in Detail
8
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1. RS-232C Port Connection
(1) COM1 - RXD: Pin No. 2, TXD: Pin No. 3, GND: Pin No. 7
RXD 2 O ----------------
O 2 Transmit Data
TXD 3 O ----------------
O 3 Receive Data
GND 7 O ----------------
O 7 Signal Ground
┌─
O 8 Carrier Detect
├─
O 20 Data Terminal Ready
└─
O 6 Data Set Ready
┌─
O 4 Request to Send
└─
O 5 Clear to Send
9 pin port (male) 25 pin port (female)
RS-232C port of CI-200 Serial port of the computer
8
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2. RS-232 Communication Protocol
8-2-1. 22 Bytes for CAS
(1) Data bit: 8, Stop bit: 1, Parity bit: none
(2) Code: ASCII
(3) Set the time to send data to the computer in the Set Mode.
▣
Send all the time: if F30 and F35 are set to 1.
▣
Send when the weight is stable: if F30 and F35 are set to 2.
▣
Send upon data request: if F30 and F35 are set to 3.
▣
Only if the computer send 1 byte of the indicator’s device ID to the indicator, the indicator
makes the defined output format.