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383
Serial Communications
Section 6-3
Related Auxiliary Area Flags for Serial Port 2 of an M-type CPU Unit
Note
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 2 Communicating with PT
Flag (A393 bits 00 to 07 for unit numbers 0 to 7).
Name
Address
Details
Read/write
Refresh timing
Serial Port 2
Communica-
tions Error Flag
A392.04
Turns ON when a com-
munications error occurs
at Serial Port 2.
ON: Error
OFF: Normal
Read
• Cleared when power is turned ON.
• Turns ON when a communications error
occurs at Serial Port 2.
• Turns OFF when the port is restarted.
• Disabled in peripheral bus mode and NT
link mode.
Serial Port 2
Communicating
with PT Flags
(See note.)
A393.00 to
A393.07
When Serial Port 2 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 2 in NT
link mode or Serial PLC Link mode.
• Bits 00 to 07 correspond to unit numbers
0 to 7, respectively.
Serial Port 2
Restart Bit
A526.00
Turn ON this bit to restart
Serial Port 2.
Read/write
• Cleared when power is turned ON.
• Turn ON to restart Serial Port 2, (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 2
Error Flags
A528.00 to
A528.07
When an error occurs at
Serial Port 2, 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 2, the
corresponding error bit is turned ON.
• The flag is automatically turned OFF by
the system when Serial Port 2 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 2 Set-
tings Changed
Flag
A619.02
Turns ON when the com-
munications conditions of
Serial Port 2 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 2 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 CPU UNIT - 03-2009
Страница 1: ...Cat No W462 E1 06 CP1L CPU Unit SYSMAC CP Series CP1L L_0D_ CP1L M_0D_ OPERATION MANUAL...
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Страница 22: ...xxii...
Страница 34: ...xxxiv Conformance to EC Directives 6...
Страница 70: ...36 Function Blocks Section 1 5...
Страница 584: ...550 Trouble Shooting Section 8 7...
Страница 627: ...593 Sample Application Section 9 12 Network Settings Network Tab Network Settings Driver Tab...
Страница 630: ...596 Sample Application Section 9 12...
Страница 654: ...620 Troubleshooting Unit Errors Section 11 4...
Страница 662: ...628 Replacing User serviceable Parts Section 12 2...
Страница 668: ...634 Standard Models Appendix A...
Страница 698: ...664 Auxiliary Area Allocations by Function Appendix C...
Страница 746: ...712 Auxiliary Area Allocations by Address Appendix D...
Страница 773: ...739 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Страница 774: ...740 Connections to Serial Communications Option Boards Appendix F...
Страница 806: ...772 Index...
Страница 808: ...774 Revision History...