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Ithaca - Technical Support Phone: 1-877-7ithaca or (607) 257-8901 Fax: (607) 257-3911 Series 50 Printer Serial Board Switch Settings SERIAL COMMUNICATION BOARD (RS232C) This optional serial interface consists of a piggy-back circuit board. After the access cover is removed, this circuit board is closest to the access opening. This board contains two DIP switch packs with a total of 16 function switches (8 switches per pack). The following shows the factory switch settings. SW1 DEFAULT SETTINGS
SW2 DEFAULT SETTINGS
SW1: SWITCHES 1 & 2 (SW1) These switches work together to set the parity of the printer to match the parity of the computer system. The factory switch setting is for NO parity.
Note: 7-bit no parity is not a true 7-bit mode, it is 7-bit but does not care about parity. The parity bit must be present or the host must be configured for 7 bits with 2 stop bits. SWITCH 3 (SW1) This switch is set ON at the factory to select 8-bit data. Set this switch OFF for 7-bit data. SWITCH 4 (SW1) This switch is set ON at the factory for Printer Ready/Busy protocol. Set this switch OFF in the computer uses XON/XOFF protocol. SWITCHES 5 & 6 (SW1) These switches work together to run two serial cable tests. One test checks for proper switch settings, the other test checks the data cable to see if it is communicating properly. The factory setting is the non-test mode, called the print mode.
SWITCHES 7 & 8 (SW1) If the READY/BUSY protocol is selected (switch 4), then the line on which the printer sends the busy signal and the signal polarity (low or high) may be selected by setting switches 7 & 8. The switches are set at the factory for a negative (low) busy signal on pin 20 (DTR).
SW2: SWITCHES 1, 2, and 3 (SW2) These switches work together to select the transmission speed (baud rate). The switches are factory set for 9600 baud.
SWITCH 4 (SW2) If the printer has pin #6, DSR, connected to the computer, then set this switch to the ON position. If the computer does not use the DSR signal, then leave this switch in the OFF position. SWITCH 5 (SW2) This switch is factory set to ON so that the printer waits until the print buffer has room for only 32 more bytes before sending a busy signal to the computer. If some data is lost during transmission, set this switch OFF. Then the printer sends a busy signal when room for 256 more characters remain in the buffer. SWITCH 6 (SW2) This switch is set ON at the factory for a 200 ms busy time. This is the period of time it takes the printer to empty the print buffer and get ready to receive data. If the computer requires more time to process a response set this switch to the OFF position. SWITCHES 7 AND 8 (SW2) These switches work together to control the Multidrop Communications Mode. On printers not equipped with the Multidrop Option, leave the switches in the factory setting, 7 on and 8 off.
Note: The Multidrop option must be present before you can utilize these switch settings. Contact Technical Support if you are unsure if this option is present. |
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Drivers
Fax: 203.949.9048
