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Unit 3: Interface Specifications
SATO MB2i Service Manual PN 9001145B Page 3-5
INFRARED RAYS (IRDA)
Infrared communications is based on technology which is similar to entertainment remote control
devices used in homes today. This technology offers a convient, interoperable, low power, and
reliable way to connect computer and printer without the use of cables. The half-duplex, serial
data interconnection capabilities supports walk up point-to-point use.
The infrared tranmission of print data is transferred from the terminal to the printer in four phases:
(1) Connection, (2) Printer Status Check, (3) Data Transfer, (4) Disconnection.
The limitations of this interface type is that it requires a direct line of sight with a reading span of
30 degrees at a maximum distance of 7-8 inches (20cm). When the peripherals are aligned, they
negociate and transmit/receive data between the two devices.
Default Parameters: DSW1 ON / DSW2-4 OFF.
BHT protocol is the communication procedure used to transmit files between DENSO data
collection devices by adopting the response method using the ACK/NAK codes defined for the
use with these types of devices. Note the IrDA parameters must be set according to PDA/DCS
methods and appropriately configured to direct data transmission to the printer. Refer to the IrDA
command settings in the Programming Reference document for this printer, as well as,
documentation provided by the manufacturer of the data collection device for the proper steps.
The appropriate firmware must be installed to function.
IRDA SPECIFICATIONS (STANDARD PROTOCOL)
Baud Rate 9600, 19200, 38400, 57600, 115200
Data Bit Length 8
Stop Bit 1
Parity Bit None, Odd, Even
Codes Used ASC-II: 7 bit, Graphics: 8 bit.
Control Codes STX (02h), SYN (16h), ETX (03h), DLE (10h)
Communication Time Time-Out: 5.99 seconds, Retry: over 500 milliseconds.
Receiving Type Single item.
Operations Mode IrSIR v1.2
IRDA SPECIFICATIONS (BHT PROTOCOL)
Baud Rate 9600, 19200, 38400, 57600, 115200
Data Bit Length 8
Stop Bit 1
Parity Bit None, Odd, Even
Codes Used ASC-II: 7 bit, Graphics: 8 bit.
Control Codes SOH (01h), STX (02h), ETX (03h), EOT (04h), ENQ (05h), ACK
(06h), DLE (10h), NAK (15h).
Communication Time Time-Out: 5.99 seconds, Retry: over 500 milliseconds.
Receiving Type Single item.