Rockwell Automation 9323-S5500D A.I. SERIES MICROLOGIX 1000 AND PLC-500 SOFTW - Manual (Page 532)

MicroLogix 1000 and PLC-500 A.I. Series Software Reference
D-ii
For example, if SYM_1 is assigned to address N7:0 , you can address bits within that
word as SYM_1_11 , or SYM_1/11 , and so on, all of which would be the equivalent of
N7:0/11 .
Important Reserved mnemonics cannot have symbols attached to them. You must attach the
symbol to the base address, and then specify the mnemonic.