TM 5-3895-374-24-1 APPENDIX 1 Serial Output Port Set-Up - Printer/Setpoint Data Comm./ Remote Display. The DF2000 Serial Output Port can be set up for the following functions: 1) Operate a printer for weight/total print-out. 2) Provide a setpoint signal to control material feed. 3) Interface with a computer for two-way communication. To set up the Port.  go to Calibration Mode and select Parameters 31 and 32, e.g. To enter Calibration Mode --> press (1) (9) (SELECT) and press ’Calibrate’  button  at back of indicator. (Flashing    ’]’    indicates Calibration Mode.) Go to Parameter 31 Serial Port Speed   -->  press  [3]  [1] [SELECT]. If  you  are  using  the  port  for  a printer  or for  data communications, set the appropriate Baud Rate: 1 = 9600 Baud 2 = 1200 Baud (Factory Preset Setting) 3 = 300 Baud e.g.  To set the Port Speed to 300 Baud --> press [3] [ENTER] (Remember the [TARE] key is the [ENTER] key while you are in the Calibration Mode.) Go to Parameter 32 Serial Port Mode  -->   press   [3]   [2] (SELECT). Set the operating mode from the following list 1 = Output only when (PRINT] button is pressed. 2 = Output when Strobe - 1. 3 = Output when Strobe = 0. 4 = Output when ASCII “?" or other poll character is received.  (Factory Preset) 5 = Continuous output. 6 = Setpoint Mode. 7 = RD2000 (To operate a remote display) e.g.  To operate a Printer --> press [1]  (ENTER). (Remember the [TARE] key is the [ENTER] key while you are in the Calibration Mode.) e.g.  To operate the port as a setpoint control --) press [6] Note: Make  sure  that you  have wired  the port correctly.  See Section II Installation for a description of the signal pins. Serial Output Format TTL Polarity is the same as RS232  standard,  but voltage levels are 0 VDC and +5 VDC.  The output is Idle  at 0 VDC and active at +5 VDC. Data Word Configuration: 1 Start Bit 7 Data Bits 1 Parity (held zero) 1 Stop Bit The port accepts five possible ASCII poll characters in Mode 4.  The polls are. ? - Send current displayed weight. 1 - Set to Channel 1 and send displayed weight. 2 - Set to Channel 2 and send displayed weight. 3 - Set to Channel 3 and send displayed weight. T - Set to Total and send displayed weight. The serial output is organized as follows   (node 4) Byte 0 “02" (Start of Text) 1 Polarity (Space or -) 2 Space 3 Data MSD ) 4 Data ) 5 Data ) 6 Data )Weight including decimal point. 7 Data ) 8 Data LSD ) 9 Space 10 K  or  L 11 G  or  B 12 Channel Information* 13 G  or  N 14 R  or  T 15 Space 16 Status (Space = valid Weight, 0 = Over, M = Motion,  - = Minus) 17 Carriage Return 18 Line Feed (page 3-72)