Wenshing RS232 Hi Power Instruction Manual page 7

Example

If you want to send data 9999 from equipment which UIP=01 to equipment which
UID=02, data format which you send is 0x71029999.
GID：D391
UID：01
Send=71029999

If you want to send data 9999 from equipment which UIP=01 to equipment which
UID=03, data format which you send is
GID：D391
UID：01
Send=71039999

If you want to send data 9999 from equipment which UIP=01 through equipment
which UID=03 to transfer to equipment which UID=04, data format which you
send is 0x7203049999.
GID：D391
UID：01
Send=7203049999
http://www.wenshing.com.tw; http://www.rf.net.tw
GID：D391
UID：03
GID：D391
Receive=9999
UID：02
0x71039999
GID：D391
Receive=9999
UID：03
GID：D391
UID：02
GID：D391
Transfer
UID：03
GID：D391
UID：02
GID：D391
UID：04
.
GID：D391
GID：D391
Receive=9999
RS232 Hi Power Data Sheet P.7
UID：04
UID：04