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362
Serial Communications
Section 6-3
Related Auxiliary Area Flags for Serial Port 1 of an L-type CPU Unit
In the same way as for the existing 1:N NT Link, the status (communicat-
ing/not communicating) of PTs in Serial PLC Links can be checked from the
Polling Unit (CPU Unit) by reading the Serial Port 1 Communicating with PT
Flag (A393 bits 00 to 07 for unit numbers 0 to 7).
Name
Address
Details
Read/write
Refresh timing
Serial Port 1
Communica-
tions Error Flag
A392.04
Turns ON when a com-
munications error occurs
at Serial Port 1.
ON: Error
OFF: Normal
Read
• Cleared when power is turned ON.
• Turns ON when a communications error
occurs at Serial Port 1.
• Turns OFF when the port is restarted.
• Disabled in peripheral bus mode and NT
link mode.
Serial Port 1
Communicating
with PT Flags
(See note.)
A393.00 to
A393.07
When Serial Port 1 is
being used in NT link
mode, the bit correspond-
ing to the Unit performing
communications will be
ON. Bits 00 to 07 corre-
spond to unit numbers 0
to 7, respectively.
ON: Communicating
OFF: Not communicating
Read
• Cleared when power is turned ON.
• Turns ON the bit corresponding to the
unit number of the PT/Polled Unit that is
communicating via Serial Port 1 in NT
link mode or Serial PLC Link mode.
• Bits 00 to 07 correspond to unit numbers
0 to 7, respectively.
Serial Port 1
Restart Bit
A526.00
Turn ON this bit to restart
Serial Port 1.
Read/write
• Cleared when power is turned ON.
• Turn ON to restart Serial Port 1, (except
when communicating in peripheral bus
mode).
Note: The bit is automatically turned OFF
by the system when restart process-
ing has been completed.
Serial Port 1
Error Flags
A528.00 to
A528.07
When an error occurs at
Serial Port 1, the corre-
sponding error bit is
turned ON.
Bit 00: Not used.
Bit 01: Not used.
Bit 02: Parity error
Bit 03: Framing error
Bit 04: Overrun error
Bit 05: Timeout error
Bit 06: Not used.
Bit 07: Not used.
Read/write
• Cleared when power is turned ON.
• When an error occurs at Serial Port 1, the
corresponding error bit is turned ON.
• The flag is automatically turned OFF by
the system when Serial Port 1 is
restarted.
• Disabled during peripheral bus mode.
• In NT link mode, only bit 05 (timeout
error) is enabled.
In Serial PLC Link mode, only the following
bits are enabled.
• Errors at the Polling Unit:
Bit 05: Timeout error
• Errors at Polled Units:
Bit 05: Timeout error
Bit 04: Overrun error
Bit 03: Framing error
Serial Port 1 Set-
tings Changed
Flag
A619.02
Turns ON when the com-
munications conditions of
Serial Port 1 are being
changed.
ON: Changed
OFF: No change
Read/write
• Cleared when power is turned ON.
• Turns ON while communications condi-
tions settings for Serial Port 1 are being
changed.
• Turns ON when the CHANGE SERIAL
PORT SETUP instruction (STUP(237)) is
executed.
• Turns OFF when the changes to settings
are completed.
Содержание CP1L-L14D Series
Страница 2: ...CP1L L14D CP1L L20D CP1L M30D CP1L M40D CP1L CPU Unit Operation Manual Revised June 2007...
Страница 3: ...iv...
Страница 9: ...x...
Страница 13: ...xiv TABLE OF CONTENTS...
Страница 21: ...xxii...
Страница 33: ...xxxiv Conformance to EC Directives 6...
Страница 65: ...32 Function Blocks Section 1 5...
Страница 153: ...120 CP CPM1A series Expansion I O Unit Wiring Section 3 6...
Страница 523: ...490 Troubleshooting Unit Errors Section 9 4...
Страница 531: ...498 Replacing User serviceable Parts Section 10 2...
Страница 563: ...530 Auxiliary Area Allocations by Function Appendix C...
Страница 611: ...578 Auxiliary Area Allocations by Address Appendix D...
Страница 638: ...605 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Страница 639: ...606 Connections to Serial Communications Option Boards Appendix F...
Страница 669: ...636 Index...
Страница 671: ...638 Revision History...