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α
2 Simple Application Controllers
The Command String 7
7 - 11
7.3.7 Device Code
Each type of Bit or Word Device has a device code which corresponds to a memory location in
the
α
2 series controller. Locations for the System Bits, Inputs, Outputs, Keys, Link Input, and
Link Output are permanent but the Function Block settings (Communication Bit and Word
Devices) must be set in the “Options/Dedicated Communication” dialog box in the VLS
software. Remember to set aside some memory in the same dialog box for these devices.
Refer to section 6.1 for VLS settings.
Note:
*1 The settings for the
α
2 controller input extension boards: Where EI 01-04 for AL2-4EX
and AL2-4EX-A2 are 129 - 132 respectively.
*2 The settings for the
α
2 controller output extension boards: Where EO 01-04 for AL2-4EYR
and AL2-4EYT are 129 - 132 respectively.
*3 Each hexadecimal value is represented by a HB and LB. Where HB is the higher byte and
LB is the lower byte.
*4 The full 100 data range can only be accessed if the appropriate memory has been
allocated from either the front panel keys or VLS software.
*5 key input numerical order
Table 7.8: Device Code and Access Data
Device Name
Device Code
(Hex)
Device Range
(Decimal)
Device Range
(Hex)
(HB LB)*3
Read
Access
Write
Access
System Bit (M) 40 1 - 24 00 01 - 00 18 Yes No
Input Terminal (I) 41 1 - 15 00 01 - 00 0F Yes Yes
External Input (EI) 41
129 - 132
*1
00 81 - 00 84 Yes Yes
Output Terminal (O) 42 1 - 9 00 01 - 00 09 Yes Yes
External Output (EO) 42
129 - 132
*2
00 81 - 00 84 Yes Yes
Key Input (K) 44
1 - 8
*5
00 01 - 00 08 Yes Yes
Link Input (E) 45 1 - 4 00 01 - 00 04 Yes Yes
Link Output (A) 46 1 - 4 00 01 - 00 04 Yes Yes
Control Device (N) 47 1 - 4 00 01 - 00 04 Yes Yes
Analog In 61 1 - 8 00 01 - 00 08 Yes No
Communication
Bit Device (CB)
48
1 - 100
*4
00 01 - 00 64 Yes Yes
Communication
Word Device (CW)
69
1 - 100
*4
00 01 - 00 64 Yes Yes
Input No. (hex)
Key
0001 “OK”
0002 “ESC”
0003 “+”
0004 “-”
0005
“”
0006
“”
0007
“”
0008
“”