Service manual

Page 3-10
Section 3. Interface Specifications
SATO M-8485Se Standard Print Engine
Service Manual
PN 9001080
Rev. A
3.7 Local Area Network (LAN) Optional Interface
A Local Area Network (LAN) interface is a Plug-In Interface Module that can be installed
by the user. It requires a driver (shipped with each printer) that has the interface
installed. The driver must be loaded on your PC and the PC must be configured to run
one of the supported network protocols using a 10/100BaseT LAN connection. Details for
loading the LAN driver are contained in the LAN Interface Manual that is shipped with
each printer with a LAN Optional interface installed.
General Specifications:
Connector: 10/100BaseT Category 5
Connector: RJ-45 Receptical
Electrical Specifications:
Power Supply: Powered from printer
3.8 Bi-Directional Communications
This is a two-way communications protocol between the host computer and the printer,
thus enabling the host to check printer status. When Bi-Com 4 communications is
selected, there is no busy signal from the printer. The host must request the complete
status from the printer, including ready/busy. The host may request status in two different
ways.
ENQUIRE/ACK/NAK
In the Bi-Com 4 mode, the host transmits an ENQ (05 hexadecimal) to the printer and the
printer will respond with its status within five milliseconds. If printing, it will respond
upon finishing the current label, then resume printing. In order for this protocol to work
properly with an RS232 Optional Interface, pin 6 (DTR) and pin 5 (CTS) must be held
high by the host. One way to ensure these pins are always in the correct state is to tie pin
20 (DTR) to pin 6 (DSR) and pin 4 (RTS) to pin 5 (CTS) at the printer end of the cable.
Enquire (ENQ)
Upon receipt of an ENQ command, the printer responds with 25 bytes of status
information bounded by an STX/ETX pair. The Bi-Com protocol works only in the Multi-
Job Buffer mode. The status information is defined as follows:
<STX>{2 Byte ID}{1 Status Byte}{6 Byte Label Remaining}{16 Byte Job Name}<ETX>