Allen-Bradley micrologix 1500 - ReadWrite

Publication 1762-RM001C-EN-P
Communications Instructions 21-5
The Target file information contained in Sub-Elements 12 through 15 of
the MSG File Element depend upon the message type, as shown in the
tables below.
The Control Bits, Sub-Element 16, of the MSG File Element are defined
below:
Message File Target Location Information
Target Device = 485 CIF
Sub-
Element
Name Description Parameter Size User Program
Access
12 Reserved Y Word read only
13 MG11:0.TFN Target File Number Y Word read/write
14 MG11:0.ELE Offset in elements into CIF Y Word read/write
15 Reserved Y Word read only
Message File Target Location Information
Target Device = 500CPU or PLC 5
Sub-
Element
Address Description Parameter Size User Program
Access
12 Target File Type Y Word read only
13 MG11:0.TFN
Target File Number
(1)
(1) The file number for RTC function files is set to 0 by the programming software.
Y Word read/write
14 MG11:0.ELE Target File Element Number for B,
S, N, T, C, R, L, ST and RTC
(2)
files; or Target File Slot Number
for O and I files.
(2) RTC and ST are only permitted in the MSG instruction for MicroLogix 1200 and 1500 Series B Controllers.
Y Word read/write
15 Target File Element Number for O
and I files.
Set to zero for any file other than
O or I.
Y Word read only
Message File Sub-Element 16 - Control Bits
Bit Address Description Parameter Size User Program
Access
15 MG11:0.0/EN Enable
1=MSG enabled
0=MSG not enabled
N bit read/write
9 to
14
Reserved N bit read/write
8 MG11:0.0/TO Time Out
1=MSG time out by user
0=no user MSG time out
N bit read/write
0 to
7
Reserved N bit read/write