Siemens SINUMERIK 840C Installation Instructions Manual page 556

09.95
Machine data which correspond to this machine data are as follows:
• Signal number variable message function (MD 1621)
• Address variable message function (MD 1622)
• Threshold variable message function (MD 1623)
• Hysteresis variable message function (MD 1624)
• Pickup delay variable message function (MD 1625)
• Delayed dropout variable message function (MD 1626)
Note:
Changes to inputs in machine data MD 1621 to MD 1624 while the monitoring function is
already active (MD 1620 - bit 0 = 1) do not automatically result in re-initialization, i.e. reset to
zero, of message bit 5. If a bit reset is required, the monitoring function must be deactivated
and then re-activated by means of MD 1620, bit 0, after the machine data has been altered.
1621
Signal number variable message function
Default value
0
Input of signal number of memory location to be monitored via the variable message function.
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Siemens AG 1992 All Rights Reserved
SINUMERIK 840C (IA)
Lower input limit Upper input limit
0
6FC5197- AA50
7 Drive Machine Data (SIMODRIVE Drive MD)
7.3.2 Drive MD (data description)
Units
100 –
Active
at once
7–141