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Addressing Reference
1785 PLC-5
17
Table H
Example Control Addresses
To Address:
PLC Data Type:
Example Address:
Whole Control Structure
structure
$R6:0
Control Position Word
signed word
$R6:0.POS
Control Length Word
signed word
$R6:0.LEN
Control Enable Bit
bit
$2R6:0.EN
Control Unload Enable Bit
bit
$2R6:0.EU
Control Done Bit
bit
$2R6:0.DN
Control Empty Bit
bit
$2R6:0.EM
Control Error Bit
bit
$2R6:0.ER
Control Unload Bit
bit
$2R6:0.UL
Control Inhibit Bit
bit
$2R6:0.IN
Control Found Bit
bit
$2R6:0.FD
Table I
SFC Status Mnemonics
Mnemonic
Structure Member
Size
PLC Data Type
.SA
Scan Active
1 bit
bit
.FS
First Scan
1 bit
bit
.LS
Last Scan
1 bit
bit
.OV
Timer Overflow
1 bit
bit
.ER
Step Errored
1 bit
bit
.DN
Done
1 bit
bit
.PRE
Preset Value
2 bytes
signed word
.TIM
Active Time
2 bytes
signed word