Station Detection Function - Omron NSH5 Operation Manual

Station Detection Function

3-8 Station Detection Function
Internal Memory
Allocation
Refer to the Host Connection Manual (Multivendor Connection) for connection
methods.
The station detection function allows the NSH5 to read the box number
switches (4-bit switches) for removable boxes. Thus, when a removable box is
connected, the NSH5 is able to detect it.
By automatically displaying station screens, and by giving notification of which
station the PLC is currently in, the stations that can be operated can be lim-
ited. To ensure safety, other forms of operation are disabled.
The PT's station detection function can be allocated any address in the inter-
nal memory, and the ON/OFF status can be monitored at the allocated
address.
To specify the address in internal memory that is to be allocated for the station
status monitor address, first select PT - System Setting in CX-Designer ver-
sion 6.5 or higher, and then click the NS Handy Terminal Tab. In the Station
Status Monitor Address Field, click the appropriate Set Button, and specify
the address that is to be allocated.
When removable boxes are used, the station numbers for the removable
boxes are acquired and notification is provided to one word in either $W or
$HW in PT memory. If function key status cannot be obtained due to a prob-
lem, such as a hardware error, or when a status error flag for an error, such as
a communications error, is generated, notification is provided to the same
word.
Bit allocations within the word is as follows:
Bit
Bit 15 Board Error Bit
Bit 14 Host Communications Error Bit
Bit 13 Reserved
Bit 12 Reserved
Bit 11 Reserved
Bit 10 Reserved
Bit 9 Reserved
Bit 8 Reserved
Bit 7 Reserved
Bit 6 Reserved
Bit 5 Reserved
Bit 4 Reserved
Bit 3 S4 (Station ID line 4 signal status)
Bit 2 S3 (Station ID line 3 signal status)
Bit 1 S2 (Station ID line 2 signal status)
Bit 0 S1 (Station ID line 1 signal status)
Any number from 1 to 15 can be set for a station box. For station number
switches, wire station ID line signals S1 to S4 in relation to the station num-
bers as shown in the following table.
Not
connected
1 2
S4 0 0 0
S3 0 0 0
Name
Station number
3 4 5 6 7 8
0 0 0 0 0 1
0 1 1 1 1 0
Section 3-8
Status
ON: Error
OFF: Normal
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0: Not connected
1 to 15 (binary format):
Station number
9 10 11 12 13 14 15
1 1 1 1 1 1
0 0 0 1 1 1
1
1
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