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Allocated CIO Area Words Section 3-2
Note 1. When the Master function is enabled, the Unit Setup File cannot be backed
up unless the scan list is enabled.
3-2-3 Master COS Send Switches (Words n+2 to n+5)
One Master COS Send Switch is allocated to each slave node address. If the
switch for a slave is turned ON, then COS output data will be sent to that
slave.
More than one of these switches may be turned ON at the same time. The
switches will return to OFF starting at the switches for the slaves to which
COS data has been sent.
If a send error occurs, the corresponding bit will turn ON in Slave Detailed
Status.
3-2-4 Disconnect/Connect Switches (Words n+6 to n+9)
One Disconnect/Connect Switch is allocated to each slave node address. If
the switch for a slave is turned ON, then remote I/O communications to that
slave will be temporarily stopped (i.e., it is disconnected from the network). A
communications error will occur at the end for any slave has been discon-
nected if the corresponding switch is turned ON during communications.
These switches are used primarily to replace slaves or to reserve a place for a
slave that will be added (when a Unit is registered in the scan list but not yet
connected). A communications error and verification error for the slave that
has been disconnected will not be generated at the master as long as the cor-
responding switch is ON.
Note These switches do not add or remove slaves from the registered scan list.
15 Unit Setup
File
Backup
Switch
OFF→
ON
User Writes user settings (scan list, communica-
tions cycle time settings, etc.) as a file on
the Memory Card in the CPU Unit. See 7-2
Memory Card Backup Functions for details.
Note Files can only be backed up with
the scan list enabled.
--- ---
En-
abled
(See
note
1.)
--- None
OFF Unit Returns to OFF after the data is written to
a file.
Note The File Read/Write Error Flag
(word n+11, bit 08) in Unit Status 2
will turn ON if data failed to be writ-
ten to file.
Bit Name Status Con-
trolled by
Unit operation Operation conditions Default
setting
CPU
Unit
oper-
ating
mode
Mas-
ter
func
tion
Scan
list
sta-
tus
Slave
func-
tion
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32
63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48
n+2
n+3
n+4
n+5
Bit15 Bit14 Bit13 Bit12 Bit11 Bit10 Bit09 Bit08 Bit07 Bit06 Bit05 Bit04 Bit03 Bit02 Bit01 Bit00