HD-150/HD-300 RS-232 Interface protocol:

The RS232 interface of HD shipping scale has two work modes: SCI.1 (factory default setting) and SCI.0 (to select the work mode, please refer the HD-150/HD-300 user manual ).

When the work mode “SCI.1” (Serial Communication Interface transmitting and receiving data format”) is selected, The HD shipping scale can work with the UPS®Worldship® Program. HD’s data transmitting or receiving format is the same as the Toledo® PS60.

When the work mode “SCI.0” is selected and scale’s “DATA” is pressed or the carriage return (0d hex) is received, HD shipping scale will transmit weight,unit,stability,over/down or low voltage message according to the following protocol:

Baud rate: 9600bps

Start bit: 1 bit

Data bits: 8 bits

Stop bit: 1 bit

Parity: none

The scale transmits 14 bytes ASCⅡ data each time: (Byte1) (Byte2) (Byte3) (Byte4) (Byte5)……(Byte8) (Byte9) (Byte10) (Byte11) (Byte12) (Byte14)

the details are as follows:

1=3D “:” starting “W” means that the following 7 (By te3……Byte9) bytes are weight;

3D“= M” means that the following 7 (Byte3……Byte9) bytes are message (e.g. “OVER”);

Byte 3=3D “-” means Byte3…Byte9 is neg= ative weight 3D “ ” me= ans Byte3…Byte9 is positive weight or other message

Byte 4.5.6.7.8.9 =3D xxxxxx means current weight or other message

Byte 10.11=3D“lb” means that the weight unit is lb;

3D “kg” means the weight unit is kg;

Byte 12=3D “S” means the readings are stable;

"3D" means the readings are unstable;

Byte 13=3D “L” means the low voltage 3D “ ” means normal voltage;

Byte 14=3Dcarriage return (0d hex);

Example:

1. When scale indicator is displaying R= 20;123.45kg” , and the scale is stable , the power is not low voltage and data received = is “0d (hex)” or “DATA” key been pressed, the scale will send out following 14 bytes : (3Ah)(57h)(20h)(31h)(32h)(33h)(2Eh)(34h)(35h)(6Bh)(67h)(53h)(20h)(0Dh ) : W 123.45 kg S

2. When scale indicator is displaying R= 20;-234.5lb” , scale is unstable , low voltage and received “0d (hex)” or 8220;DATA” key been pressed, the scale will send out following 14 bytes : (3Ah)(57h)(2Dh)(32h)(33h) (34h) (2Eh) (35h)(30h)(6Ch)(62h)(20h)(4Ch)(0Dh) : W - 234.50l b L

3. When scale indicator is displaying “_____” , current weight unit is “kg”, scale is stable , not low voltage and received “0d (hex)” or “DATA” key been pressed,= the scale will send out following 14 bytes : (3Ah)(4Dh)(20h)(64h)(6Fh)(77h)(6Eh)(20h)(20h)(6Bh)(67h)(53h)(20h)(0Dh= ) : M down = kg S

RS-232 connect between HD scale and Host :

Scale--------------------------Cable-----------------------------------Host

(DB9 female)-----(DB9 male)----------------------(DB9 female)--------(DB9 male)

TXD 2---------------2----------------------------------2---------------2 RXD

RXD 3---------------3----------------------------------3---------------3 TXD

GND 5---------------5----------------------------------5---------------5 GND

DSR 4---------------4----------------------------------4---------------4 DTR

DTR 6---------------6----------------------------------6---------------6 DSR

CTS 7---------------7----------------------------------7---------------7 RTS

RTS 8---------------8----------------------------------8---------------8 CTS

NC  1---------------1----------------------------------1---------------1

NC  9---------------9----------------------------------9---------------9

Note: HD scale DB9 female’s pin4 and pin6 is shorted, pin7 and pin8 is shorted!

Note that his guide is Copyright GKI Technologies. Unauthorized reprinting is prohibited.