Controllogix Example: Read Registers - Mitsubishi 700 Series Instruction Manual

9.2.13 ControlLogix Example: Read Registers

This example program will show how to continuously read a block of registers from the inverter with a
single MSG instruction. Only one read request is outstanding at any given time.
1) Create new Tags.
a) Double click "Controller Tags" in the
controller organizer view.
b) The "Controller Tags" window appears.
Refer to Figure 55.
c) Select the "Edit Tags" tab at the bottom.
d) Create a new tag by entering
"connection" in the first blank Name
field, and change its Data Type to
"MESSAGE". This tag will contain configuration information for the MSG instruction.
e) Select the "Monitor Tags" tab. Expand the "connection" tag by clicking on the "+" sign next to
the tag name. Scroll down to the connection.UnconnectedTimeout field and change its value
from the default 30000000 (30s in 1uS increments) to 1000000 (1s). This value determines how
long to wait before timing out and retransmitting a connection request if a connection failure
occurs.
f) Collapse the "connection" tag again by clicking on the "-" sign next to the tag name.
PROTOCOL-SPECIFIC INFORMATION
Figure 55: Create New Tags
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