Document Contents
PICUS manual Using PICUS and CustomLogic
Modbus tables
• Modbus address list
◦ PLC addresses
◦ Corresponding controller functions
• Descriptions for function codes, function groups
1.2 Warnings and safety
1.2.1 Safety during installation and operation
Installing and operating the equipment may require work with dangerous currents and voltages. The installation must only be carried
out by authorised personnel who understand the risks involved in working with electrical equipment.
DANGER!
Hazardous live currents and voltages. Do not touch any terminals, especially the AC measurement inputs and the relay
terminals. Touching the terminals could lead to injury or death.
1.2.2 Controller power supply
The controller must have a reliable power supply, which must include a backup power supply. In addition, the switchboard design
must ensure that the system is sufficiently protected if the controller power supply fails.
If the controller has no power supply, it is OFF and does not provide any protection. The controller cannot enforce any trips,
shutdowns or latches when it is off. The controller does not provide any control or power management. All the controller relays de-
energise.
1.2.3 Connect the controller protective earth
You must ground the controller rack to create a protective earth.
DANGER!
Failure to ground the controller rack could lead to injury or death.
1.2.4 Switchboard control
Under Switchboard control, the operator controls and operates the equipment from the switchboard. When Switchboard control is
activated:
• The controller trips the breaker and/or shuts down the engine, if an alarm situation arises that requires a trip and/or shutdown.
• The controller does not respond to a blackout.
• The controller does not provide any power management.
• The controller does not accept operator commands.
• The controller cannot and does not prevent any manual operator actions.
The switchboard design must therefore ensure that the system is sufficiently protected when the controller is under Switchboard
control.
1.2.5 Factory settings
The controller is delivered pre-programmed from the factory with a set of default settings. These settings are based on typical values
and may not be correct for your system. You must therefore check all parameters before using the controller.
DESIGNER'S HANDBOOK 4189340911K UK Page 22 of 521
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