AKT2G-ENC-190-000

Incremental encoder interfaceClosed Position signaling by 2 signals with 90° phase difference (i.e., quadrature) is no absolute position output. with differential input, 16/32 bit

Figure 8-47: AKT2G-ENC-190-000

The AKT2G-ENC-190-000 EtherCATClosed Ethernet ofr Control Automation Technology. EtherCAT® is an open, high-performance Ethernet-based fieldbus system. The development goal of EtherCAT is to apply Ethernet to automation applications which require short data update times (also called cycle times) with low communication jitter (for synchronization purposes) and low hardware costs. Terminal is an interface for directClosed The orientation components of a vector in space. connection of incremental encodersClosed The incremental encoder is simpler in design than the absolute encoder. It consists of two tracks and two sensors whose outputs are called channels A and B. As the shaft rotates, pulse trains occur on these channels at a frequency proportional to the shaft speed. The phase relationship between the signals yields the direction of rotation. AKA: Relative encoder. with differential inputs (RS422). A 16-bit counter (in normal operating mode) or a switchable 16/32-bit counter (in enhanced operating mode) with a quadrature decoder and a 16-bit latchClosed The control word is used to activate the drive's latch status machine. The latch control word is processed independently of the EtherCAT® bus cycle. The status word is used to return the drive's latch status. (in normal operating mode) or 32-bit latch (in enhanced operating mode) for the zero pulseClosed Output once per turn from incremental encoders, used to zero the machine. can be read, set or enabledClosed Enable signal for the drive, Hardware-Enable with 24V signal to X8, Software-Enable command by setup Software, fieldbus or permanently set. Both are required for enabling the drive.. Incremental encodersClosed Generates an output signal directly proportional to the movement of the motor shaft. This signal is fed into the control circuitry to control the shaft position and speed. The most common types are: Incremental/Serial encoders, Hall effect sensors, Resolvers, Tachometer Generators See: Optical encoders. with alarm output can be connected at the negative switching status input of the interface. The measurement of periodClosed Motor systems having a reciprocating or oscillating motor that operates synchronously with the periodicity of the source which supplies the electrical energy. The period of execution of a pipe is the time spent between two successive computations of set values for the same pipe. The period of execution of a pipe is specified by the PERIOD parameter of the input pipe block. and frequency is possible. The gate input allows the locking of the counter, alternatively with a high or low level. The latch input is similarly configurable and evaluates high or low levels. The AKT2G-ENC-190-000 can also be used as bidirectional counter on channel A; channel B specifies the countClosed Internal count pulses, 1 pulse = 1/2^20turn. direction.

Related Topics: Map Input and Output to Variables

Technology

The AKT2G-ENC-190-000 incremental encoder interface terminal enables connection of incremental encoders with

A/B/C trackClosed Characterized by an axis group that follows with its movement the movement of another axis group. to the Bus Coupler and the PLCClosed Programmable Logic Controller - A digital computer used for automation of industrial processes, such as control of machinery on factory assembly lines. Used to synchronize the flow of inputs from (physical) sensors and events with the flow of outputs to actuators and events.. A 16-bit counter (in normal operating mode) or a switchable 16/32-bit counter (in enhanced operating mode) with a quadrature decoder and a 16-bit latch (in normal operating mode) or 32-bit latch (in enhanced operating mode) can be read, set or enabled. Differential signals based on RS422 are provided as encoder connection. From hardware 09 single-ended 5 V signals are possible for the AKT2G-ENC-190-000 based on pull-up resistors.

In addition to the encoder inputs A, B and C, an additional latch input G1 (24 V) and a gate input G2 (24 V) for locking the counter during operation are available.

The terminal is supplied as a 4-fold quadrature decoder with complementary analysis of the sensorClosed A type of transducer that converts one type of energy into another for various purposes including measurement or information transfer. signals A, B, C. If the incremental encoder has an alarm output it can be connected to the INPUT 1 status input of the AKT2G-ENC-190-000. The AKT2G-ENC-190-000 can optionally be operated as a bidirectional counter terminal on channel A.

AKT2G-ENC-190-000 input impedance

The signal source must be able to operate the input impedance of the AKT2G-ENC-190-000 (typically 220 Ω, subject to modification) with adequate voltage levels according to RS422.

Gate/latch input

For gate and latch inputs (24 V) a max. input frequency of 1 MHz is permitted. Subject to modification.

Level on interface

In differential mode the AKT2G-ENC-190-000 expects the signal levels after RS422. The data are transferred without ground reference as voltage difference between two cables (signal A and inverted signal /A). The terminal analyses signal levels in the range -200 mV < Vid < +200 mV as valid signals. The differential signal must be in the common mode range (<+13.2 V and >-10 V, with respect to GND) (cf. diagram). Signal levels outside this range can lead to destruction.

Figure 8-48: Level interface

In differential mode only the voltage difference is evaluated, so that common-mode interference on the transmission link does not lead to corruption of the wanted signal, since any interference affects both cables simultaneously.

If the AKT2G-ENC-190-000 is only operated in single-ended mode, a nominal level voltage between 3.5 V and 5.5 V is expected.

Technical Data

Technical Data

AKT2G-ENC-190-000

Sensor connection A, ¬A, B, ¬B, C, ¬C (RS422 differential inputs) also single-ended connection (5 V ±20%) possible
Additional inputs

gate, latch (24 VDC, both max. 1 MHz permitted),

status input (max. 5 VDC, potential-free, switching to negative potential)

Encoder operating voltage / Encoder supply 5 VDC (generated from the 24 V DC power contacts)
Sensor output current 0.5 A
Counter 16 bit, 16/32 bit switchable
Zero pulseClosed When the step gets activated, the action is activated for a single execution, and possibly once again when the step is deactivated. latch 16 bit, 16/32 bit switchable
Limit frequency 1 MHz (equals 4 million increments with 4-fold evaluation)
Quadrature decoder 4-fold evaluation
Distributed ClocksClosed Clock signal. in enhanced operating mode
Broken wire detection to sensor in enhanced operating mode
Commands read, set, enable
Cycle time min. 100 µs
Current consumption via Ebus typ. 130 mA
Current consumption from the power contacts 0.1 A (excluding sensor load current)
Electrical isolation 500 V (E-bus/field voltage)
Bit width in process image up to 6 bytes outputs, 22 bytes inputs, depends on parametrization
MTBF (+55°C) -
Weight approx. 100 g
Permissible ambient temperature range during operation -25°C ... +60°C (extended temperature range)
Permissible ambient temperature range during storage -40°C ... +85°C
Permissible relative humidity 95%, no condensation
Dimensions (W x H x D) approx. 27 mm x 10 mm x 70 mm (width aligned: 24 mm)
Mounting on 35 mm mounting rail conforms to EN 60715
Vibration/shock resistance conforms to EN 60068-2-6 / EN 60068-2-27, see also installation instructions for enhanced mechanical load capacity
EMC immunity/emission conforms to EN 61000-6-2 / EN 61000-6-4
Protection class IP20
Installation positionClosed Position means a point in space which is described by different coordinates. Depending on the used system and transformation it can consist of a maximum of six dimensions (coordinates).This means three Cartesian coordinates in space and coordinates for the orientation. In ACS there can be even more than six coordinates. If the same position is described in different coordinate systems the values of the coordinates are different. variable
Approval CE ATEX cULus