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16. RS-232C SERIAL INTERFACE / EXTERNAL INPUT

RS-232C

The balance is a DCE device. Connect the balance to a personal computer (DTE), using a straight

through cable or a modem cable.

Transmission system : EIA RS-232C

Transmission form : Asynchronous, bi-directional, half duplex

Data format : Baud rate : 600, 1200, 2400, 4800, 9600 bps

Data bits : 7 or 8 bits

Parity : Even, Odd (Data bits 7 bits)

None (Data bits 8 bits)

Stop bit : 1 bit

Code : ASCII

Pin connections

Pin No. Signal name Direction Description

1 FG - Frame ground

2 RXD Input Receive data

3 TXD Output Transmit data

4 RTS Input Ready to send

5 CTS Output Clear to send

6 DSR Output Data set ready

7 SG - Signal ground

18 PRINT Input Same as the PRINT key

19 RE-ZERO Input Same as the RE-ZERO key

8 – 25 (Excluding 18 and

19)

- - Not connected

Note

The signal names for the RS-232C are the same as those for the DTE side except TXD and

RXD.

Circuits

Summary of content (12 pages)

PAGE 1
6. RS-232C SERIAL INTERFACE / EXTERNAL INPUT RS-232C The balance is a DCE device. Connect the balance to a personal computer (DTE), using a straight through cable or a modem cable. Transmission system Transmission form Data format : : : EIA RS-232C Asynchronous, bi-directional, half duplex Baud rate : 600, 1200, 2400, 4800, 9600 bps Data bits : 7 or 8 bits Parity : Even, Odd (Data bits 7 bits) None (Data bits 8 bits) Stop bit : 1 bit Code : ASCII Pin connections Pin No.
PAGE 2
External input Pin 18 and pin 19 perform the same function as pressing the PRINT and RE-ZERO keys respectively by connecting each pin to pin 7 for at least 100 m seconds. Use of example The external input (AX-HDB-25P/CTF) and the (AX-SW128) are sold separately.
PAGE 3
17. CONNECTION TO PERIPHERAL EQUIPMENT 17-1 Connection to the AD-8121B Printer Set the following parameters to use the AD-8121B printer. Function setting dout prt 0-3 dout ap-p 0-2 dout ap-b 0-2 dout pU5e 0,1 5if bp5 2 5if btpr 0 5if Crlf 0 5if Ct5 0 Factory setting Factory setting Factory setting Factory setting Description Selects a print mode. Selects the polarity for the auto print mode. Selects the auto print difference. Selects data output pause.
PAGE 4
17-3 Using Windows Communication Tools (WinCT) When Windows is used as an operating system in a personal computer, the provided WinCT can be used to transmit the weighing data to the personal computer. The WinCT has two communication methods: “RsCom” and “RsKey”. For details on WinCT, refer to the WinCT instruction manual. The current version of the WinCT can be downloaded from the A&D website. RsCom Can transmit commands to control the balance.
PAGE 5
Using the GX series balance memory function The weighing data, instead of outputting it immediately to an external device, can be stored in the balance’s memory. Later, all of the weighing data stored can be output to a personal computer at one time. 6 Using a personal computer as an external indicator With the “RsKey” test mode function, a personal computer can be used as an external weight indicator for the balance. (To do this, set the balance data output mode to stream mode.
PAGE 6
18. COMMANDS 18-1 Command List Commands to query weighing data C Q S SI SIR E SCP Cancels the S or SIR command. Requests the weighing data immediately. Requests the weighing data when stabilized. Requests the weighing data immediately. Requests the weighing data continuously. Requests the weighing data when stabilized. Note: The “Q” and “SI” commands, the “S” and “ESCP” commands behave the same. Commands to control the balance CAL MCL MD:nnn OFF ON P PT: .
PAGE 7
Commands to control the comparator function HI: . LO: ?HI ?LO g . g Sets the upper limit value. e.g.,HI:+2.34 value to 2.34 g: represents a space.) Sets the lower limit value. e.g.,LO:+1.23 value to 1.23 g: represents a space.) Outputs the upper limit value. Outputs the lower limit value. g (to set the upper limit g (to set the lower limit Notes “nnn” and “mm” indicate, respectively, three-digit and two-digit numerical values.
PAGE 8
18-3 Command Examples ON command Personal computer Time Balance Standby mode ON command O N CR LF AK CR LF All segments AK CR LF Command received All segments are displayed Command completed Zero display R command Personal computer Time Balance Weighing mode R command R CR LF AK CR LF Command received In process AK CR LF Command completed Zero display 72
PAGE 9
CAL command Personal computer Time Balance Zero display CAL command C A L CR LF AK CR LF Command received AK CR LF Command completed Zero display Error code Personal computer Time Balance Weighing mode (unstable) R command R CR LF AK CR LF Command received In process When the R command can not be achieved due to unstable weighing: E C , E 1 1 CR LF Error code CAL command When the CAL command is received, the balance returns to the weighing mode C A L CR LF AK CR LF Command completed Weig
PAGE 10
Weighing with a tare Personal computer Time Balance R command Sets the display to zero R CR LF AK CR LF Command received In process AK CR LF Command completed Zero display Place a container TR command Tares T R CR LF AK CR LF Command received In process AK CR LF Command completed Zero display S command R CR LF 㹑㹒㸪㸩㸮㸮㸯㸮㸮㸬㸮㸮ࠉࠉ㹥 ?PT command (Net value) ? P T CR LF 㹎㹒㸪㸩㸮㸮㸯㸰㸴㸬㸶㸵ࠉࠉ㹥 (Tare value) 74
PAGE 11
Setting a negative target value and filling with a sample until the display becomes zero Personal computer Time Balance Place a container Before command execution R command R CR LF AK CR LF Command received In process AK CR LF Zero display PT: command to set a target weight of 100 g P T : 1 0 0 .
PAGE 12
18-4 Control Using CTS and RTS Depending on the “Ct5” parameter of “Serial interface ( 5if )”, the balance performs as follows: Ct5 0 Regardless of whether the balance can receive a command or not, the balance keeps the CTS line HI. The balance outputs data regardless of condition of the RTS line. Ct5 1 The CTS line is kept Hi normally. When the balance can not receive the next command (e.g. while the balance is processing last command), the balance sets the CTS line to Lo.