3. ESTUDIO EMPÍRICO:
3.3 Opinión del distribuidor:
Description
The central process data exists for different telegrams. For example, telegram 391 is used for transferring measuring times and digital inputs/outputs.
The following central process data is available: Receive signals:
CU_STW Control Unit control word A_DIGITAL Digital outputs
MT_STW Probe control word Transmit signals:
CU_ZSW Control Unit status word E_DIGITAL Digital inputs
MT_ZSW Probe status word
CU_STW (control word for Control Unit, CU) See function diagram [2448]
Table 4-20 Description CU_STW (control word for Control Unit)
Bit Meaning Comments BICO
0 Synchronizations flag – This signal is used to synchronize the jointsystem time between the master and slave. BI: p0681
1...6 Reserved – – –
7 Acknowledging faults 0/1 Acknowledging faults BI: p2103
8...11 Reserved – – –
12 Master sign–of–life bit 0 – 13 Master sign–of–life bit 1 –
Master sign of life CI: p2045
14 Master sign–of–life bit 2 – Master sign of life CI: p2045
15 Master sign–of–life bit 3 –
A_DIGITAL (digital outputs)
This process data can be used to control the Control Unit outputs. See function diagram [2449]
Table 4-21 Description A_DIGITAL (digital outputs)
Bit Meaning Comments BICO
0 Digital input/output 8 (DI/DO8) – DI/DO 8 on the Control Unit must be parameter-ized as an output (p0728.8 = 1). BI: p0738
1 Digital input/output 9 (DI/DO9) – DI/DO 9 on the Control Unit must be parameter-ized as an output (p0728.9 = 1). BI: p0739
2 Digital input/output 10 (DI/DO 10) – DI/DO 10 on the Control Unit must be para-meterized as an output (p0728.10 = 1). BI: p0740
3 Digital input/output 11 (DI/DO 11) – DI/DO 11 on the Control Unit must be para-meterized as an output (p0728.11 = 1). BI: p0741
4 Digital input/output 12 (DI/DO 12) – DI/DO 12 on the Control Unit must be para-meterized as an output (p0728.12 = 1). BI: p0742
5 Digital input/output 13 (DI/
DO 13) –
DI/DO 13 on the Control Unit must be para-
meterized as an output (p0728.13 = 1). BI: p0743 6 Digital input/output 14 (DI/DO 14) – DI/DO 14 on the Control Unit must be para-meterized as an output (p0728.14 = 1). BI: p0744
7 Digital input/output 15 (DI/
DO 15) –
DI/DO 15 on the Control Unit must be para-
meterized as an output (p0728.15 = 1). BI: p0745
PROFIdrive Cyclic communication
MT_STW
Control word for the ”central probe” function. Display via r0685.
Table 4-22 Description MT_STW (control word for Control Unit)
Bit Meaning Comments BICO
0 Falling edge probe 1 – Activation of measuring time determination
1 Falling edge probe 2 –
Activation of measuring time determination with the next falling edge
2...7 Reserved – –
CI: p0682 8 Rising edge probe 1 – Activation of measuring time determination CI: p0682
9 Rising edge probe 2 –
Activation of measuring time determination with the next rising edge
10...15 Reserved – –
CU_ZSW (status word for Control Unit, CU) See function diagram [2458]
Table 4-23 Description CU_ZSW (status word for Control Unit)
Bit Meaning Comments BICO
0...2 Reserved – – –
3 Fault active 1 Fault active BO: r2139 3
3 Fault active
0 No fault present BO: r2139.3
4...6 Reserved – – –
7 Alarm present 1 Alarm present BO: 2139 7
7 Alarm present
0 No alarm present BO: 2139.7
8 SYNC – – BO: r0899.8
9...11 Reserved – – –
12 Slave sign–of–life bit 0 – 13 Slave sign–of–life bit 1 –
Slave sign of life Implicity in-
14 Slave sign–of–life bit 2 – Slave sign of life
Implicity in terconnected 15 Slave sign–of–life bit 3 –
E_DIGITAL (digital inputs)
See function diagram [2459]
Table 4-24 Description E_DIGITAL (digital inputs)
Bit Meaning Comments BICO
0 Digital input/output 8 (DI/DO= 8) – DI/DO 8 on the Control Unit must be para-meterized as an input (p0728.8 = 0). BO: p0722.8
1 Digital input/output 9 (DI/DO= 9) – DI/DO 9 on the Control Unit must be para-meterized as an input (p0728.9 = 0). BO: p0722.9
2 Digital input/output 10 (DI/DO = 10) – DI/DO 10 on the Control Unit must be para-meterized as an input (p0728.10 = 0). BO: p0722.10
3 Digital input/output 11 (DI/
DO = 11) – DI/DO 11 on the Control Unit must be para-meterized as an input (p0728.11 = 0). BO: p0722.11 4 Digital input/output 12 (DI/DO = 12) – DI/DO 12 on the Control Unit must be para-meterized as an input (p0728.12 = 0). BO: p0722.12
5 Digital input/output 13 (DI/
DO = 13) – DI/DO 13 on the Control Unit must be para-meterized as an input (p0728.13 = 0). BO: p0722.13 6 Digital input/output 14 (DI/DO = 14) – DI/DO 14 on the Control Unit must be para-meterized as an input (p0728.14 = 0). BO: p0722.14
7 Digital input/output 15 (DI/
DO = 15) – DI/DO 15 on the Control Unit must be para-meterized as an input (p0728.15 = 0). BO: p0722.15 8 Digital input 0 (DI 0) – Digital input DI 0 on the Contol Unit BO: r0722.0 9 Digital input 1 (DI 1) – Digital input DI 1 on the Contol Unit BO: r0722.1 10 Digital input 2 (DI 2) – Digital input DI 2 on the Contol Unit BO: r0722.2 11 Digital input 3 (DI 3) – Digital input DI 3 on the Contol Unit BO: r0722.3 12 Digital input 4 (DI 4) – Digital input DI 4 on the Contol Unit BO: r0722.4 13 Digital input 5 (DI 5) – Digital input DI 5 on the Contol Unit BO: r0722.5 14 Digital input 6 (DI 6) – Digital input DI 6 on the Contol Unit BO: r0722.6 15 Digital input 7 (DI 7) – Digital input DI 7 on the Contol Unit BO: r0722.7
Note:
The bidirectional digital inputs/outputs (DI/DO) can be connected as either an input or an output (see also receive signal A_DIGITAL).
PROFIdrive Cyclic communication
MT_ZSW
Status word for the ”central probe” function.
Table 4-25 Description MT_ZSW (status word for the central probe function)
Bit Meaning Comments BICO
0 Digital input probe 1 –
Display of the digital inputs 1 Digital input probe 2 – Display of the digital inputs
2...7 Reserved – –
CO: r0688
8 Sub–sampling probe 1 –
Not yet carried out
CO: r0688 9 Sub–sampling probe 2 – Not yet carried out.
10...15 Reserved – –
MTn_ZS_F and MTn_ZS_S
Displays the determined measuring time
Features of the central probe
The time stamps from probes in more than one drive can be transferred simul- taneously in a single telegram.
The time in the controller and drive unit is synchronized via the CU_STW and the CU_ZSW.
Note: The controller must support time synchronization!
A higher–level controller can then use the time stamp to determine the actual position value of more than one drive.
The system outputs a message if the measuring time determination function in the probe is already in use (see also p0488, p0489, and p0580).
Example: central probe
Assumptions for the example:
Determination of the time stamp MT1_ZS_S by evaluating the rising edge of probe 1
Determination of the time stamp MT2_ZS_S and MT2_ZS_F by evaluating the rising and falling edge of probe 2
Probe 1 on DI/DO9 of the Control Unit (p0680[0] = 1) Probe 2 on DI/DO10 of the Control Unit (p0680[1] = 2) Manufacturer–specific telegram p0922 = 391 is set
a b la u fd ia g ra m m _ ze nt r_ m es se n .v sd 1 0 MT_STW .0 1 0 Value available MT2_ZS_F 1 0 Probe 1 1 0 Probe 2 1 0 1 0 MT_STW .8 MT_STW .9 Value available MT1_ZS_S 1 0 1 0 Value available MT2_ZS_S
PROFIdrive Acyclic communication