Chapter 2 Operating Principles
2-4. Interface
CL-E720DT
2-58
(3)
Parallel port status signals when an error occurs
The following table shows the status signal change when an error occurs.
Under the specifications for this bi-directional parallel interface, the parallel port status signals
when an error occurs are, as shown below, partially processed differently than with Compatible
mode used up till now. When bi-directional parallel interface is on in the setting menu, even if a
printer error has occurred, the BUSY signal line is not active (“High”).
Error
Compatible mode
Paper end
Busy:
PError:
Select:
Fault:
L
H
L
H
H
L
H
L
Error other than paper end
• Head open
• Other
Busy:
PError:
Select:
Fault:
L
H
L
unchanged
H
L
H
L
Conditions for Busy
• Receive buffer full
• Data being read
• Error
(4)
Compatible timing specification
[When power is on] (Timing to go on-line)
BUSY
SELECT
Power On
ACK
Reset
Summary of Contents for CL-E720DT
Page 1: ...Technical Manual CL E720DT Direct Thermal Barcode Label Printer ...
Page 5: ...Chapter 1 Specifications 1 1 CL E720DT CHAPTER 1 SPECIFICATIONS ...
Page 15: ...Chapter 2 Operating Principles 2 1 CL E720DT CHAPTER 2 OPERATING PRINCIPLES ...
Page 75: ...Chapter 3 Disassembly and Maintenance 3 1 CL E720DT CHAPTER 3 DISASSEMBLY AND MAINTENANCE ...
Page 119: ...Chapter 4 Troubleshooting 4 1 CL E720DT CHAPTER 4 TROUBLESHOOTING ...
Page 131: ...Chapter 5 Parts Lists 5 1 CL E720DT CHAPTER 5 PARTS LISTS ...
Page 159: ...Chapter 5 Parts Lists 5 29 CL E720DT DRAWING NO 7 Unit Opepane Rev 0 ...
Page 162: ...Chapter 5 Parts Lists CL E720DT 5 32 DRAWING NO 8 Accessories Rev 0 3 2 1 1 1 2 1 3 ...
Page 164: ...Chapter 6 Circuit Diagrams 6 1 CL E720DT CHAPTER 6 CIRCUIT DIAGRAMS ...
Page 183: ...Appendices AP 1 CL E720DT APPENDICES ...
Page 186: ...Appendices A Mounting Diagrams CL E720DT AP 4 2 Solder side ...