Siemens SINUMERIK 802C Manual page 53

Possible alarm responses are:
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PLC Stop : The user program is no longer executed, the NC Ready relay drops out, and
the hardware outputs are disabled ( OUTDS ).
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EMERGENCY STOP: The PLC provides the EMERGENCY STOP signal to the NCK in
the user interface after the user program has been executed.
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Feed disable: The PLC provides the Feed Disable signal to the NCK in the user interface
after the user program has been executed.
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Read–in disable: The NCK provides the Read–in Disable signal to the NCK in the user
interface after the user program has been executed.
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NC Start inhibited: The PLC provides the NC Start Inhibited signal to the NCK after the
user program has been executed.
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SHOWALARM : This alarm has no alarm response (bit0 – bit5 =0).
Priority of cancel conditions
The cancel conditions have the following priority:
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POWER ON CLEAR – system alarms (highest priority)
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CANCEL CLEAR – system alarms
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SELF–CLEARING – system alarms
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POWER–ON CLEAR – user alarms
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CANCEL CLEAR – user alarms
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SELF–CLEARING – user alarm (lowest priority)
System alarms
see Diagnostics Guide
User alarms
The user interface "1600xxxx" provides the user with two sub–ranges for setting a user alarm.
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Sub–range 0: 4 x 8 bits to set user alarms (0 –> 1 edge)
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Sub–range 1: User alarm variables
The respective bit (sub–range 0) with a 0/1 edge change will activate a new user alarm.
Sub–range 1 is intended for additional user information.
Sub–range 2 can be used to analyze the active alarm responses.
Sub–range 1 can only be read or written as a double word. Sub–range 2 can only be read.
You can delete self–clearing alarms by resetting the respective bit in the variable range
''1600xxxx'' in sub–range 0 (1 –> 0 edge).
The remaining user alarms are cleared by the PLC after detecting the respective cancel condi-
tion. If the alarm is still present, the alarm occurs again.
SINUMERIK 802C
6FC5 597–3AA20–0BP2 (01.02)
Byte 0 : Bit0 => 1st user alarm '' 700000 ''
Byte 3 : Bit7 => 32nd user alarm '' 700031 ''
Start-Up
4.3 Starting up the PLC
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