Siemens SINUMERIK 840D Description Of Functions page 224

Hide thumbs Also See for SINUMERIK 840D:
Table of Contents

Advertisement

4 Data Descriptions
4.1 Machine data
36950
$MA_SAFE_MODE_SWITCH_TIME
MD number
Tolerance time for SGE changeover
Default: 0.5
Change becomes effective after POWER ON:
Data type: DOUBLE
Meaning
SGE changeovers do not take effect simultaneously owing to variations in run times for
SGE transmission in the two monitoring channels. A crosswise data comparison would
output an error message in this case.
This data is used to specify the period of time after SGE changeover during which no
crosswise comparison of actual values and monitoring results is carried out (machine data
is still compared!). The selected monitoring functions continue to operate unhindered in
both monitoring channels.
A safe function is immediately activated in a monitoring channel if selection or changeover
is detected in this channel.
The different run times are mainly determined by the PLC cycle time.
Special cases, errors
System-dependent minimum tolerance time:
2 x PLC cycle time (maximum cycle) + 1 x IPO cycle time
The variations in run times in the external circuitry (e.g. relay operating times) must also
be taken into account.
References
Refer to Chapter 3, "Safety-relevant input/output signals (SGE/SGA)"
36951
$MA_SAFE_VELO_SWITCH_DELAY
MD number
Delay time speed changeover
Default: 0.1
Change becomes effective after POWER ON:
Data type: DOUBLE
Meaning
A timer with the value in this data is started when changing from a high to a lower safely-
reduced speed or when a safe operating stop is selected when the safely-reduced speed
function is active.
While the timer is running, the speed continues to be monitored for the last selected
speed limit value. During this period, the axis/spindle can be braked, for example, via the
PLC user program without the monitoring function signaling an error and initiating a stop
response.
Examples:
1.
2.
3.
36952
$MA_SAFE_STOP_SWITCH_TIME_C
MD number
Transition time, STOP C to safe operating stop
Default: 0.1
Change becomes effective after POWER ON:
Data type: DOUBLE
Meaning
This data defines the time period between the initiation of a STOP C and the activation of
the safe operating stop function.
Once the time has expired, the drive is monitored for safe operating stop. If the
axis/spindle has still not been stopped, STOP B/A is initiated.
36953
$MA_SAFE_STOP_SWITCH_TIME_D
MD number
Transition time, STOP D to safe operating stop
Default: 0.1
Change becomes effective after POWER ON:
Data type: DOUBLE
Meaning
This data defines the time period between the initiation of a STOP D and the activation of
the safe operating stop function.
Once the time has expired, the drive is monitored for safe operating stop. If the
axis/spindle has still not been stopped, STOP B/A is initiated.
4-224
SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
Min. input value: 0
Protection level (R/W) 7/2
Applies from SW 3.4
Min. input value: 0
Protection level (R/W) 7/2
Applies from SW 3.4
The timer is interrupted as soon as a higher or identical SG limit (i.e. to that which
was previously active) is selected.
The timer is interrupted if "non-safe operation" (=NSB SGE "de-select SBH/SG=1) is
selected.
The timer is retriggered (restarted) if an SG limit lower than the one previously active
is selected or SBH is selected while the timer is running.
Min. input value: 0
Protection level (R/W) 7/2
Applies from SW 3.4
Min. input value: 0
Protection level (R/W) 7/2
Applies from SW 3.4
Max. input value: 10
Unit: s
Max. input value: 10
Unit: s
Max. input value: 10
Unit: s
Max. input value: 60
Unit: s
© Siemens AG 2003 All Rights Reserved
11.03
840D
840D
840D
840D

Hide quick links:

Advertisement

Table of Contents
loading

This manual is also suitable for:

Simodrive 611 digital

Table of Contents