Timing Sequence; Error Processing; Usb Interface; Usb Interface Connector And Specifications - SNBC BTP-R880NPI Service Manual

Handshaking: Hardware

3.1.5 Timing sequence

The software handshake (XON/XOFF) timing sequence:
When XON/XOFF control is selected, the printer transmits XON or XOFF signals as follows.
XON
Transmission
XOFF
Transmission
Notes:
1) Definition of "receive buffer full": default size of receive buffer is 4K (which can be set to 45Byte/64K).
When the buffer size is less than a certain amount (the number of bytes is n1) and the interface is serial,
receive buffer is full and keep full status. It is not full until the buffer size is increased to another certain
amount. (The number of bytes is more than n1).
2) Definition of XON/XOFF: XON is 0X11 and XOFF is 0X13.
The hardware handshake (XON/XOFF) timing sequence:
When hardware handshake is selected, the status of signal DTR/DSR is shown as below:
DTR
DSR

3.1.6 Error processing

Error phenomena: Data can not be sent and received.
Error causes:
1) The cable is not connected reliably.
2) The parameter setting is wrong.
3) The circuit is void welded or damaged.
Error detects and debugs:
1) Check whether the serial cable is connected reliably or not, if not, please connect it again.
2) Check whether the serial port setting of host is same as the printer configuration sheet or not, if
not, please configure the serial port setting again and send the data again.
3) Check whether the serial port signal is normal or not, If not, please check whether signal channel
is normal or not. If so, please check whether SU01 is void welded or not. If not, please replace
SU01.

3.2 USB interface

3.2.1 USB Interface Connector and Specifications

The USB Interface Connector is a standard USB B Interface Connector.

3.2.2 Signal Define of the USB Interface Module

Signal Define:
1) When the printer goes online after turning on the power
2) When the receive buffer is released from the buffer full state
1) When the receive buffer becomes full
1) When power on the printer and the printer is on line.
2) When receive buffer is released from full status.
1) W hen receive buffer is full.
Printer status
Printer status
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BTP-R880NPII Service Manual
Action
Transmit
Transmit
Transmit
Status
SPACE
SPACE
SPACE