Siemens Sinumerik 802D sl Instruction Manual page 170

Starting Up the PLC
11.3 PLC alarms
Type of action of a user alarm
User alarms have a higher priority than the appropriate signal in the user interface
(e.g. NC start inhibited, read-in disable, feed disable and EMERGENCY STOP).
Example:
MD 14516[0]: USER_DAT_PLC_ALARM = 8
If alarm 700000 is present, in addition, alarm 3000 EMERGENCY STOP is also present
even if the interface signal V26000000.1=0.
Configuring user alarms
A configuration byte is provided for each alarm. The user alarms can be configured by the
user in the machine data 14516: USER_DATA_PLC_ALARM.
Default setting of MD 14516[0...63]: 0 => SHOWALARM/SELF-CLEARING user alarm
Structure of a configuration byte:
S Bit0 – bit5 :
S Bit6 – bit7 :
Alarm responses:
Cancel criteria: Bit6 + bit7 = 0: SELF-CLEARING alarm (default)
The alarm response to PLC Stop always has the cancel condition POWER ON.
Alarm texts
The user are offered two options of defining his own alarm texts:
S by using the System hardkey \ softkeys PLC \ Edit PLC alarm txt (see "Operation and
Programming", Chapter 7)
S by using the toolbox: Editing and loading the alarm text file using the text manager
If no alarm text is assigned by the user, only the alarm number is displayed.
The % character in the alarm text denotes an additional variable. The variable type is the
form of representation of the variable.
The following variable types are possible:
S %D integer decimal number
S %I integer decimal number
S %U decimal number without sign
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Alarm responses
Cancel criteria
Bit0 – bit 5 = 0: Showalarm (default)
Bit0 = 1: NC start inhibited
Bit1 = 1: Read–in disable
Bit2 = 1: Feed disable for all axes
Bit3 = 1: EMERGENCY STOP
Bit4 = 1: PLC stop
Bit5 = reserved
Bit6 = 1 : CANCELCLEAR alarm
Bit7 = 1 : POWERONCLEAR alarm
SINUMERIK 802D sl Instruction Manual (BA), 05/2005 Edition
6FC5 397-0CP10-1BA0