Ithaca 610 Programmer's Guide - TransAct

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Communications Ithaca ® 610 Programmer’s Guide Serial Device Identification The serial device must report its identification to the system using an identification string at 1200 baud. The identification string consists of 18 fields that identify the device, class of the device, and other compatible devices. Only five of the fields are required by all serial devices; all others are optional. The identification string used by the Ithaca ® 610 Printer follows. 028H Start of ASCII response 0,1 PnP Rev 'IPR0210' Unique ID (IPR plus revision level) \PRINTER Printer \M610 PcOS Model \SC: 19200,N,8,1 Serial Configuration: Baud, Parity, Bits, Stop Bits xxH Check-sum 029H End PnP Note: The model field may be altered to generate PnP ID‘s other than ―M610 PcOS‖ by special order. When the identification is complete, the printer returns to the baud rate specified in the configuration. Page 246 Rev D 28-05897
Communications Ithaca ® 610 Programmer’s Guide Serial Port Inquire The serial port inquire is more straightforward than parallel mode. The serial acknowledged (ACK) or not acknowledged (NAK) responses follow a uniform format, the ACK or NAK is always followed by the command ID that requested it. This makes the design of the host application easier because the response can be identified and always follows the same format. The host sends an inquire to the printer asking for the form sensor status. The printer receives the request and preprocesses it. The host receives the response and decodes it. The printer responds with an [ACK] or [NAK] indicating the form sensor status. Flow Chart 3 Inquire Flow The host sends an [ENQ] (form sensor status) request to the printer. The printer responds with an [ACK] indicating that the request was identified, status true. Inquire commands affect the printer‘s performance. Communication is a high priority for the printer. Inquire commands take processing time away from the print tasks. It is possible to ask for so much status that the printer slows. In serial mode, it is important that the response to an inquiry is received by the host before another command is issued. When an inquiry is received by the printer, it is buffered in a high-speed processing queue. When the printer has time, it empties the queue and processes the inquiries. The printer responds to the command as soon as the second byte of the command is taken from the high-speed buffer. If the host is looking for a form to be inserted, it should not send status requests as fast as it can. The host will receive a response to all of them. If the host did not wait for a response to each, there would be unnecessary responses. In IEEE 1284 mode, inquire responses are placed in an IEEE 1284 transmit queue. When the IEEE 1284 reverse channel is open, the responses are returned to the host. It is important that after each request the reverse channel be opened. Inquire responses remain in the queue until read. If the [ENQ] command is sent to the printer, the IEEE 1284 buffer will be cleared, and only the response to the [ENQ] will remain. 28-05897 Rev D Page 247
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PN 28-05897 Rev D November 2010 Ith
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Federal Communications Commission R
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Table of Contents Change History ..
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Standard Emulation ................
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Figures Figure 1 Receipt Printing,
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28-05897 Rev D Page ix
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About Your Ithaca ® 610 Printer It
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About Your Ithaca ® 610 Printer It
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chapter 2 Ithaca ® 610 Specificati
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Specifications and Requirements Ith
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Pin Number Direction Direction Dire
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chapter 3 Setup Procedures 28-05897
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Setup Procedures Ithaca ® 610 Prog
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How to Operate the Ithaca ® 610 It
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chapter 5 Configuring Your Ithaca
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Configuring Your Ithaca ® 610 Prin
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Programming Codes Ithaca ® 610 Pro
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Ithaca 610 Programmer's Guide - TransAct

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