User manual

Chapter 2 Module Description
2-2 ADVANCED MICRO CONTROLS INC
Program Mode vs. Display Mode
The front panel has two operating modes.
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Program Mode –(Yellow PRG light on)
The parameters can be modified from
the keyboard. The position can be preset by pressing the
>CLEAR@ key while displaying the position value.
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Display Mode –(Yellow PRG light off)
The parameters can be inspected, but not
modified. You cannot preset the position from the keyboard.
Program Mode and Display Mode refer to the modules’ front panel only. Once enabled by
setting the Transfer Type and PLC Program parameters appropriately, you can always program
the module from the backplane.
The module can be locked into Display Mode in one of two ways. The first is by removing
a jumper on the module. The second is writing the Disable Keyboard auxiliary command from
the processor. It is usually good practice to lock the module in display mode once the system is
operational. This will prevent someone from accidentally changing the parameters while the
system is running. The only times that changes to the programming should be allowed are
during set-up or trouble shooting procedures.
Program Switch
The Program Switch is used to quickly enable or
disable program mode as long as the 1700 module
has not been locked in display mode from the
processor. The module is in program mode when
the switch is pushed towards the back of the
module. The module is in display mode when the
switch is pushed towards the front of the module.
The yellow PRG light is on when the module is in
program mode.
The Program Switch can be disabled by remov-
ing the jumper on the two pin header next to the
switch. Removing this jumper locks the 1700 in
display mode. You can also lock the module in
display mode with the Disable Keyboard auxiliary
command. See chapter 1, pg. 1-10, Auxiliary
Commands for more information on enabling or
disabling the keyboard from the processor.
Remove system power before
removing or installing any
module in an I/O chassis. Failure to observe this
warning can result in damage to the module's
circuitry and/or undesired operation with possible
injury to personnel.
Two Pin Header
with Jumper Installed.
Program Switch in
Program Mode position.
PROGRAM
DISPLAY
Figure 2.2 Program
Switch