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Communications Instructions
Publication 1763-RM001B-EN-P - April 2007
In this example, the controller reads 10 elements from the target's (Local
Node 2) N7 file, starting at word N7:50. The 10 words are placed in the
controller's integer file starting at word N7:0. If five seconds elapse before
the message completes, error bit MG11:0/ER is set, indicating that the
message timed out.
Valid File Type Combinations
Valid transfers between file types are shown below for MicroLogix
messaging:
Local Data Types
Communication Type Target Data Types
(1)
(1)
<---> read/write
O
, I
, B, N, L
T
<---> read/write
C
<---> read/write
R
<---> read/write
(2)
--->
write
RTC
(3)
<---> read/write
ST
(1) Output and input data types are not valid local data types for read messages.
(2) 500CPU write RTC-to-Integer or RTC-to-RTC only.
(3) MiroLogix 1100 OS Series B FRN 4 or later.
Example 2 - Local Read from a 485CIF
Message Instruction Setup
O, I, S, B, N, L
T
C
R
N, RTC
(3)
ST
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