Siemens SINUMERIK 840C Installation Instructions Manual page 558

09.95
1622
Default value
0000
Input of address of memory location to be monitored via the variable message function.
Note:
This machine data is operative only if the signal number is set to 0 (see MD 1621).
1623
Default value
000000
Input of threshold for the memory location address entered in machine data "Address variable
message function" (MD 1622) to be monitored via the variable message function. In
conjunction with machine data "Hysteresis variable message function" (MD 1624), this
machine data defines the actual value to be checked by the monitoring function (see diagram
under MD 1620).
Note:
Depending on the setting of bit 2 in machine data "Bits variable message function" (MD 1620,
the numerical value entered in MD 1623 is interpreted either as an unsigned value (bit 2 = 0)
or a signed value (bit 2 = 1).
1624
Default value
000000
Input of hysteresis (tolerance band) for the memory location address entered in machine data
"Address variable message function" (MD 1622) which is to be monitored by the variable
message function. In conjunction with machine data "Threshold variable message function"
(MD 1623), this machine data defines the actual value to be checked by the monitoring
function (see diagram under MD 1620).
Note:
Regardless of the setting of bit 2 in machine data "Bits variable message function" (MD 1620),
the numerical value entered in MD 1624 is interpreted either as an unsigned value (bit 2 = 0)
or a signed value (bit 2 = 1).
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Siemens AG 1992 All Rights Reserved
SINUMERIK 840C (IA)
Address variable message function
Lower input limit Upper input limit
0000
Threshold variable message function
Lower input limit Upper input limit
000000
Hysteresis variable message function
Lower input limit Upper input limit
000000
6FC5197- AA50
7 Drive Machine Data (SIMODRIVE Drive MD)
7.3.2 Drive MD (data description)
Units
FFFF Hex
Units
FFFFFF Hex
Units
FFFFFF Hex
Active
at once
Active
at once
Active
at once
7–143