Siemens SINUMERIK 840C Installation Instructions Manual page 485

7 Drive Machine Data (SIMODRIVE Drive MD)
7.2.2 FDD MD (data description - SW 3)
1603
Default value
240
Input of timer for the motor temperature alarm. When the value set in "Motor temperature
warning" (MD 1602) is exceeded, a message is transferred to the SERVO and a time monitor
activated. If the timer runs out before the temperature drops below the limit, the drive initiates
a generator braking operation and suppresses the transistor drive signals for the appropriate
axis after MD 1404 (pulse suppression) in conjunction with MD 1403 (creep speed).
Note:
Changing the timer setting will not influence a time monitoring function already in progress
(counter started). The change will become applicable when the motor temperature has
dropped below the warning limit (MD 1601).
1604
Default value
200
Input of DC-link undervoltage warning threshold. When the voltage drops below this value, a
message is sent to the SERVO. This message is output on the 1st page of the FDD service
display: DC link "off".
1605
Default value
200
Input of "Speed controller at fixed stop" timer. The output of the speed controller (current
setpoint value) is monitored. In the event of a fault, the control pulses for the power section
transistors are suppressed on the drive side when the timer setting has expired.
Note:
Setting values of MD 1065 < MD 1404 (Timer pulse suppression) are rejected as parameteri-
zation errors.
The monitoring function is independent of internal operating modes (feedforward control,
function generator, etc.).
1700
Default value
0000
This machine data is used to display the status of the binary inputs.
7–70
Timer motor temperature alarm
Lower input limit Upper input limit
0
ZK undervoltage warning threshold
Lower input limit Upper input limit
0
Timer speed controller at fixed stop
Lower input limit Upper input limit
20
Status of binary inputs
Lower output limit Upper output limit
0000
©
Siemens AG 1992 All Rights Reserved
Units
600
Units
600
Units
10 000 ms
Units
7FFF Hex
6FC5197- AA50
SINUMERIK 840C (IA)
09.95
Active
at once
s
Active
at once
V
Active
at once
Active
at once