BACnet Gateway Kit for Central Air Conditioners
9
CPU type PCD3.Mxxxx Battery module
LED Batt Run Halt Error
Colour Red Green Red Yellow
Run ○ ● ○ ○
Run cond� ○ ●/○ ○ ○
Run with error ○ ● ○ ●
Run cond. with error ○ ●/○ ○ ●
Stop ○ ○ ○ ○
Stop with error ○ ○ ○ ●
Halt ○ ○ ● ○
System diagnostics ○ ●/○ ●/○ ●/○
Batt./Super Cap voltage absent ● ○ ○ ○
○ LED off ● LED on ●/○ LED ashing
Start Self-diagnosis for approx. 1 sec. after switching on or after a Restart
Run
Normal processing of the user program after Start. Where a programming unit
is connected via a PCD8.K11x in PGU mode (e.g. PG5 in PGU mode), the
CPU automatically goes into the Stop state and not the Run state; this is for
safety reasons
Run conditional
Conditional Run state. A condition has been set in the debugger (Run until…),
which has not yet been met
Run with error Same as Run, but with an error message
Run cond. with error Same as conditional Run, but with an error message
Stop
The Stop state occurs in the following cases:
• Programming unit in PGU mode connected when the CPU was switched on
• PGU stopped by programming unit
• Condition for a COND.RUN has been met
Stop with error Same as Stop, but with an error message
Halt
The Halt state occurs in the following cases:
• Halt instruction processed
• Serious error in user program
• Hardware fault
• No program loaded
• no communication module on an S-Bus PGU or Gateway Master port
System diagnostics If the PLC doesn‘t go to RUN after 2 minutes, you have to send it for repair
Reset
The RESET state has the following causes:
• Supply voltage too low
• Firmware not starting up
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