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Serial Communications
Section 6-1
Procedure
The Serial PLC Links operate according to the following settings in the PLC
Setup in the Polling Unit and Polled Units.
Settings at the Polling Unit
1,2,3...
1.
Set the serial communications mode of serial port 1 or 2 to Serial PLC
Links (Polling Unit).
2.
Set the link method to the Complete Link Method or Polling Unit Link Meth-
od.
3.
Set the number of link words (up to 10 words for each Unit).
4.
Set the maximum unit number in the Serial PLC Links (0 to 7).
Settings at the Polled Units
1,2,3...
1.
Set the serial communications mode of serial port 1 or 2 to Serial PLC
Links (Polled Unit).
2.
Set the unit number of the Serial PLC Link Polled Unit.
PLC Setup
Settings at the Polling Unit
Settings at the Polled Unit
Note Both serial ports cannot be used for PLC Links at the same time. If both ports
are set for PLC Links (either as polling node or polled node), a PLC Setup set-
ting error (non-fatal error) will occur and the PLC Setup Setting Error Flag
(A40210) will turn ON. If PLC Links is set for one serial port, set the other
serial port to a different mode.
Item
Set value
Default
Refresh timing
Serial port
1 or 2
Mode: Communications mode
PC Link (Master): PLC Link Polling Unit
Host Link
Every cycle
Baud: Baud rate
38,400 bps, 115,200 bps
9,600 bps
PC link mode: PLC Link method
ALL: Complete link method
Masters: Polling Unit method
ALL
Link words: No. of link words
1 to 10 words
10 words
PC Link Unit No.: Max. unit No.
0 to 7
0 hex
Item
Set value
Default
Refresh timing
Serial port
1 or 2
Mode: Communications mode
PC Link (Slave): PLC Link Polled Unit
Host Link
Every cycle
Baud: Baud rate
38,400 bps, 115,200 bps
9,600 bps
Unit number
0 to 7
0
Summary of Contents for CP1H-CPU - 05-2006
Page 2: ...CP1H X40D CP1H XA40D CP1H Y20DT D CP1H CPU Unit Operation Manual Revised May 2006...
Page 3: ...iv...
Page 11: ...xii TABLE OF CONTENTS...
Page 15: ...xvi...
Page 19: ...xx...
Page 31: ...xxxii Conformance to EC Directives 6...
Page 71: ...40 Function Blocks Section 1 5...
Page 133: ...102 Computing the Cycle Time Section 2 7...
Page 169: ...138 CPM1A Expansion I O Unit Wiring Section 3 6...
Page 411: ...380 Clock Section 6 8...
Page 519: ...488 Replacing User serviceable Parts Section 10 2...
Page 527: ...496 Standard Models Appendix A...
Page 535: ...504 Dimensions Diagrams Appendix B...
Page 628: ...597 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Page 629: ...598 Connections to Serial Communications Option Boards Appendix F...
Page 659: ...628 PLC Setup Appendix G...
Page 665: ...634 Index work words 159 write protection 370...
Page 667: ...636 Revision History...