47
Station Detection Function
Section 3-8
• Yokogawa FA-M3 Series PLCs
Refer to the
Host Connection Manual (Multivendor Connection)
for connection
methods.
3-8
Station Detection Function
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.
Internal Memory
Allocation
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
Name
Status
Bit 15
Board Error Bit
ON: Error
OFF: Normal
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)
0: Not connected
1 to 15 (binary format):
Station number
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)
Summary of Contents for NSH5
Page 2: ......
Page 4: ...iv ...
Page 12: ...xii ...
Page 16: ...xvi ...
Page 24: ...xxiv EC Directives 6 ...
Page 58: ...34 Installing the Mounting Bracket Section 2 5 ...
Page 86: ...62 Connection Method Section 4 5 ...
Page 92: ...68 Precautions When Replacing the PT Section 5 4 ...
Page 98: ...74 General Specifications Appendix A ...
Page 99: ...75 Appendix B Dimensions 75 50 176 223 75 Four M4 70 5 16 5 ...
Page 102: ...78 Types of Memory Appendix C ...
Page 107: ...83 Recommended Enabling Circuits Appendix D Program Example ...
Page 108: ...84 Recommended Enabling Circuits Appendix D ...
