IQH1S 1U Enclosure
SECTION 3
IQH1SOPS
23/11/06
www.snellwilcox.com
Version 1 Issue 4
3.5
Control Panels
A mainframe and the modules that it contains, may be controlled by the following methods:-
1. Locally, by use of an active front panel (the control panel) for the 1U system
2. Remotely, by use the same control panel as in (1) above, connected by a single cable assembly
3. Remotely, from any number of control panels (1U), connected via the RollCall communications network
4. Remotely, from any number of PC’s connected via the RollCall communications network
5. Preset controls and switches are provided on the card edge of each module, accessible behind the
drop-down front panel.
The RollCall Communications System and Computer Control System
RollCall remote control gives a uniquely powerful and flexible operating system that can be as simple as a
single rack unit with control panel, or a powerful multi-master, multi-slave configuration with PC controllability
for full station automation.
The RollCall command protocol derives control panel operating software from the IQ module being addressed.
This unique feature ensures that module updates or additions will not require control system software upgrades
- simply plug in and switch on.
For modules with the RollCall option fitted all card edge control functions are available on the remote control
panel or any other controlling device. For some module cards additional control functions and readouts will be
available to the RollCall panel but will not be accessible via the card edge controls.
Note that for some modules if any of the preset switches mentioned above are set to the ON position, it will not
be possible for the function to be disabled by the remote control mechanism. Under these circumstances a
message will be displayed on the active remote control panel indicating that control is not available. To avoid
this situation it is recommended that all card edge preset switches be set to the OFF position.
When the unit (or module) is powered-up the module will normally assume the same set-up conditions that
existed at the last power-down. This information is provided by the non-volatile memory of the module's
dedicated Control Processing Unit under the control of RollCall. Some modules incorporate methods that allow
other set-up conditions to exist on power-up; please consult the information specific to each module for details.
