Addressing Reference
1785 PLC-5
15
T
able D
Example
T
imer Addresses
To Address: PLC Data Type: Example Address:
Whole Timer Structure structure $T4:5
Timer Accumulated Word signed word $T4:3.ACC
Timer Preset Word signed word $T4:3.PRE
Timer Enabled Bit bit $T4:3.TE
Timer Timing Bit bit $T4:3.TT
Timer Done Bit bit $T4:3.TD
T
able E
Counter
Mnemonics
Mnemonic Structure Member Size PLC Data Type
.CU Up Enable 1 bit bit
.CD Down Enable 1 bit bit
.DN Done 1 bit bit
.OV Overflow 1 bit bit
.UN Underflow 1 bit bit
.PRE Preset Value 2 bytes signed word
.ACC Accumulated Value 2 bytes signed word
Figure 15
Counter
Structure
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
17375–I
CU CD DN Reserved
PRE – Preset V
alue (–32,768 thru +32,767)
ACC –
Accumulated V
alue (–32,768 thru +32,767)
OV UN
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