Siemens SINUMERIK 840C - Manual (Page 450)

12.93 7 Drive Machine Data (SIMODRIVE Drive MD)
7.1.2 MSD MD (data description - SW 3)
Description of user-programmable messages:
• | n
act
| < n
min
(function no. 1)
The PLC status message is set when | n
act
| < n
min
. Settable in MD 21.
• Ramp-up complete (function no. 2)
The PLC status message is set when the actual speed value corresponds to the setpoint,
allowing for the tolerance band set in MD 27. This status message is not output when the
speed fluctuates as a result of load changes.
• | M
d
| < M
dx
(function no. 3)
The PLC status message is set when | M
d
| > M
dx
. The percentage setting in MD 47 is
referred to the currently active speed-dependent torque limit. If the PLC status message
n
act
= n
set
is set when the speed setpoint is changed, then the PLC status message | M
d
|
< M
dx
cannot be reset for at least 800 ms after the PLC status message n
act
= n
set
has
been reset.
• | n
act
| < n
x
(function no. 4)
The PLC status message is set when | n
act
| < n
x
. Settable in MD 23.
• Motor overtemperature prewarning (function no. 5)
The PLC status message is set when the maximum motor temperature is reached (MD 63
for motor 1, MD 291 for motor 2). If the message does not disappear, then the drive
module is shut down with the "Motor overtemperature" alarm after the delay which can be
set in MD 65.
• Heat sink overtemperature prewarning (function no. 6)
The PLC status message is set when the temperature switch of the main heat sink
responds. If the message does not disappear, then the drive module is shut down after
approximately 2 minutes with the "Heat sink overtemperature" alarm.
• Variable relay function 1 (function no. 7)
MD 185 Address for monitoring 1 0000 ... FFFFH
MD 186 Threshold for monitoring 1 0000 ... FFFFH
MD 187 ON-delay monitoring 1 0 ... 10.00 ms
MD 188 Drop delay monitoring 1 0 ... 10.00 ms
MD 189 Hysteresis monitoring 1 0000 ... FFFFH
• Variable relay function 2 (function no. 8)
MD 190 Address for monitoring 2 0000 ... FFFFH
MD 191 Threshold for monitoring 2 0000 ... FFFFH
MD 192 ON-delay monitoring 2 0 ... 10.00 ms
MD 193 Drop delay monitoring 2 0 ... 10.00 ms
MD 194 Hysteresis monitoring 2 0000 ... FFFFH
• n
act
= n
set
(function no. 20)
The PLC status message is set when severe speed fluctuations occur as a result of load
changes.
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50 7–35
SINUMERIK 840C (IA)