Spectrum Controls 1762sc-OF8 - Manual (Page 11)

MicroLogix™ Analog Output Module 14
Publication 0100163-01 Rev. B
Once the module detects the transition from Program to Run it waits until the
Fixed Words and Command code are set to valid values. The first command must
be Unlock. If an error is detected, a non-zero response will be placed in the
Response Code (see Input Data File table).
Keep in mind the module is constantly polling the output file as it is updated by the
controller. The module will validate each command using the following three step
process:
1) Validate Fixed Words 1-3:
These words must always be valid during Command Mode. An error will
be posted in the Response Code until these are correct. Commands will
not be validated and processed until these words are set correctly. The
fixed words are posted above in the Output Data File table.
2) Validate Command:
If the Fixed Words are valid, the Command word will be checked. If it is
not set to a valid command, an error will be reported. Initially the module
only checks for the Unlock command. After the Unlock command is
detected, the module must detect a transition in the Command word to
trigger a new command.
MicroLogix™ Analog Output Module 11
Publication 0100163-01 Rev. B
Wiring the Finger-Safe Terminal Block
Be careful when stripping wires. Wire fragments that fall into
a module could cause damage when power is applied. Once
wiring is complete, ensure the module is free of all metal
fragments.
When wiring the terminal block, keep the finger-safe cover in place.
1. Route the wire under the terminal pressure plate. You can use the stripped
end of the wire or a spade lug. The terminals will accept a 6.35 mm (0.25
in.) spade lug.
2. Tighten the terminal screw making sure the pressure plate secures the
wire. Recommended torque when tightening terminal screws is 0.904 Nm
(8 in-lbs).
3. After wiring is complete, remove the debris shield.
If you need to remove the finger-safe cover, insert a screw
driver into one of the square wiring holes and gently pry the
cover off. If you wire the terminal block with the finger-safe
cover removed, you will not be able to put it back on the
terminal block because the wires will be in the way