Information: DC4395. X20 module Counter modules DC General information

Transcription

1 24.11 DC General information The DC4395 module is a multifunctional counter module. It can be connected to two SSI encoders, two ABR encoders, four AB encoders, or eight event counters. Four outputs are available for pulse width modulation. The functions can also be mixed (see section "Connection possibilities" on page 1049). 24 VDC encoder inputs SSI, ABR, AB or event counters for inputs Pulse width modulation for outputs 24 VDC and for encoder supply Information: This module is a multi-function module. Some bus controllers only support the default function model described below. This is indicated in the documentation for the individual bus controllers. Default function model: 1x ABR incremental encoder (24 V) 1x SSI absolute encoder (24 V) 1x event counter (24 V) 2x PWM output (24 V) 1042

2 Order data Model number Short description Figure Counter module X20DC4395 X20 digital counter module, 2x SSI absolute encoder 24 V, 2x ABR incremental encoder 24 V, 4x AB incremental encoder 24 V, 8x event counter, or 4x PWM, local time measurement functions X20TB12 X20BM11 Required accessories X20 terminal block, 12-pin, 24 V coded X20 bus module, 24 V coded, internal I/O supply is interconnected Technical data Table 627: DC Order data Product ID Short description DC4395 I/O module 2 SSI absolute encoder 24 V, 2 ABR incremental encoder 24 V, 4 AB incremental encoder 24 V, 8x event counter, or 4x pulse width modulation, time measurement, relative time stamp SSI absolute encoder Amount 2 Encoder inputs 24 V, asymmetrical Counter size 32-bit Maximum transfer rate 125 kbit/s Encoder supply Module-internal, max. 600 ma Incremental encoder Amount 4 Encoder inputs 24 V, asymmetrical Counter size 16/32-bit Input frequency (max.) 100 khz Evaluation 4x Encoder supply Module-internal, max. 600 ma Chapter 4 X20 module Table 628: DC Technical data 1043

3 Product ID Event counter Amount 8 Rated voltage 24 VDC Counter size 16-bit Input frequency (max.) 100 khz Evaluation Each edge, cyclic counter Signal form Square wave pulse Time measurement Possible measurements Gate time, period duration, edge offset for various channels Measurements per module Up to 9 Measurements per channel Up to 2 Counter size 16-bit Internal counter frequency 8 MHz, 4 MHz, 2 MHz, 1 MHz, 500 khz, 250 khz, 125 khz, 62.5 khz Signal form Square wave pulse Measurement type Continuous or triggered Digital outputs Amount 4 Rated voltage 24 VDC Rated output current 0.1 A Total current 0.4 A Output circuit Sink or source Output protection Thermal cutoff for overcurrent and short circuit, integrated protection for switching inductances Pulse width modulation 1) Period duration Factor for period duration Pulse length Resolution for pulse length Actuator supply DC µs to 1.36 s n/48000 s, n = 2 to ) 0 to 100% 0.1% Module-internal, max. 600 ma Table 628: DC Technical data (cont.) 1044

4 Product ID General information Status indicators Diagnostics Module run/error Outputs Electrical isolation Encoder - Bus Output - Bus Output - Encoder Encoder - Encoder Output - Output Power consumption Bus I/O internal Certification Operating conditions Operating temperature Horizontal installation Vertical installation Relative humidity Mounting orientation Installation at altitudes above sea level m >2000 m Protection type Storage and transport conditions Temperature Relative humidity Mechanical characteristics Spacing Comment DC4395 I/O function per channel, operating state, module status Yes, with status LED and software status Yes, with status LED and software status (output status) Yes Yes No No No 0.01 W 1.5 W CE, C-UL-US, GOST-R 0 C to +55 C 0 C to +50 C 5 to 95%, non-condensing Horizontal or vertical No derating Reduction of ambient temperature by 0.5 C per 100 m IP20-25 C to +70 C 5 to 95%, non-condensing mm Order terminal block 1x X20TB12 separately Order bus module 1x X20BM11 separately Chapter 4 X20 module Table 628: DC Technical data (cont.) 1) Dead time when switching between push and pull: Max. 1.5 µs 2) For an example of calculating the period duration, see section "Calculating the period duration" on page

5 Additional technical data Product ID SSI absolute encoder Coding CLK: Output current Overload behavior of the encoder supply Incremental encoder Overload behavior of the encoder supply Event counter DC4395 Gray/Binary Max. 100 ma Short circuit protection, overload protection Short circuit protection, overload protection Counter frequency 200 khz Input filter Hardware Software 2 µs - Input current at 24 VDC Approx. 1.3 ma Input resistance 18.4 k Switching threshold Low High <5 VDC >15 VDC Isolation voltage betw. channel and bus 500 V eff Digital outputs Design Push / Pull / Push-Pull Switching voltage 24 VDC (-15% / +20%) Diagnostics status Output monitoring Leakage current when switched off Max. 25 µa Residual voltage < A rated current Short circuit peak current <10 A Switching on after overload or short circuit cutoff Switching delay Switching frequency Resistive load Inductive load Braking voltage when switching off inductive loads Isolation voltage betw. channel and bus General information Approx. 10 ms (depends on the module temperature) <2 µs <2 µs Max. 24 khz See the section "Switching inductive loads" on page 1051 (at 90% duty cycle) Switching voltage VDC 500 V eff B&R ID code $1CC5 Input voltage 24 VDC (-15% / +20%) Type of signal lines Shielded cables should be used for all signal lines Table 629: DC Additional technical data 1046

6 Status LEDs Figure LED Color Status Description r Green Off Module supply not connected Single flash Reset mode Blinking Preoperational mode On RUN mode e Red Off Module supply not connected or everything is OK On Error or reset state 1-8 Green Status of the corresponding digital signal Table 630: DC Status indicators Chapter 4 X20 module 1047

7 Pin assignments Shielded cables should be used for all signal lines. X20 DC 4395 r e Channel 1 Channel 2 Channel 5 Channel 6 Channel 3 Channel 7 Channel 4 Channel 8 Encoder 1 24V+ Encoder 2 24V Connection example Figure 494: DC Pin assignments DC Data Data Clock Clock Counter 1 A B R A B R Counter 2 PWM PWM +24 VDC +24 VDC Figure 495: DC Connection example 1048

8 Connection possibilities Channels 1 to 8 can be connected as follows: Channel Function 1 I Event counter A A SSI data 2 I/O Event counter B B SSI clock PWM 3 I Event counter A R 4 I/O Event counter B Enable reference PWM 5 I Event counter A A SSI data 6 I/O Event counter B B SSI clock PWM 7 I Event counter A R 8 I/O Event counter B Enable reference PWM The functions can also be mixed. For example: Example 1 Example 2 Example 3 Channel Function Channel Function Channel Function 1 SSI data 1 SSI data 1 Event counter 2 SSI clock 2 SSI clock 2 PWM 3 Event counter 3 A 3 Event counter 4 PWM 4 B 4 PWM 5 A 5 Event counter 5 SSI data 6 B 6 Event counter 6 SSI clock 7 Event counter 7 Event counter 7 A 8 PWM 8 Event counter 8 B Chapter 4 X20 module Example 4 Example 5 Example 6 Channel Function Channel Function Channel Function 1 A 1 A 1 Event counter 2 B 2 B 2 Event counter 3 R 3 Event counter 3 Event counter 4 Enable reference 4 PWM 4 PWM 5 A 5 A 5 SSI data 6 B 6 B 6 SSI clock 7 R 7 Event counter 7 A 8 Enable reference 8 Event counter 8 B 1049

9 Input circuit diagram Input x VDR Input status I/O status 24 V Encoder x PTC 24 V LED (green) Output circuit diagram Figure 496: DC Input circuit diagram 24 V Output status Push PTC Output x Output status Pull VDR Output monitoring Figure 497: DC Output circuit diagram 1050

10 Switching inductive loads H 10 H 1 H 0.1 H Coil resistance [ ] Coil inductance ma = Calculating the period duration max. operating cycles / second (at 90 % duty cycle) Figure 498: DC Switching inductive loads The four outputs of the DC2395 can be operated as PWM outputs. The period duration is calculated using the following formula: PeriodDuration = n s H A value of 2 to can be defined for n. Example Chapter 4 X20 module n Period duration Frequency µs 24 khz ms 2 Hz s 1 Hz s 0.73 Hz Table 631: DC Calculation of the period duration 1051

11 ReferenceModeEncoder01 channel The reference mode is written cyclically by incremental encoder 1. Bit 0 and bit 1 make up the definition: $C1... Single reference $C3... Continuous referencing After a successful single reference (indicated by the status bits), the reference mode must first be turned back off (value = $C0). After the status has taken on the value $00, the reference process can be started again with the value $C1. Bit Description 0-1 Setting the reference mode Off (default) Single reference Reserved Continuous referencing ReferenceModeEncoder02 channel The reference mode is written cyclically by incremental encoder 2. Bit 0 and bit 1 make up the definition: $C1... Single reference $C3... Continuous referencing After a successful single reference (indicated by the status bits), the reference mode must first be turned back off (value = $C0). After the status has taken on the value $00, the reference process can be started again with the value $C1. Bit Description 0-1 Setting the reference mode Off (default) Single reference Reserved Continuous referencing

12 StatusInput01 channel The status of incremental encoder 1 is read cyclically. Bit Description After the first reference pulse, this is always After the first reference pulse 3 Toggles after every completed reference 0/1... Toggle after each completed reference 4 After the first reference pulse, this is always After the first reference pulse 5-7 Cyclic counter which is increased by 1 as soon as a reference pulse is detected xxx... Counter status StatusInput02 channel The status of incremental encoder 2 is read cyclically. Bit Description After the first reference pulse, this is always After the first reference pulse 3 Toggles after every completed reference 0/1... Toggle after each completed reference 4 After the first reference pulse, this is always After the first reference pulse 5-7 Cyclic counter which is increased by 1 as soon as a reference pulse is detected xxx... Counter status Chapter 4 X20 module 1053