EJ2502 - 2-channel pulse width output module 24 V DC

EJ2502 - operation modes

The EJ2502 output module has three basic operation modes with additional settings for each channel (channel 1: n=0, channel 2:n=1):

Pulse width (standard)
Pulse width and frequency (16 bit)
Pulse width and frequency 1 Hz (32-bit)

The basic setting is done via the process data selection.
The differences and setting options are illustrated in the following table.

 
Operation modes
Pulse width (standard)
OP mode can be set via
CoE Index 0x80n0:07 (ch.1: n=0, ch.2: n=1)
Pulse width and
frequency (16 bit)
Pulse width and frequency 1 Hz (32-bit)
CoE index 0x80n0:07
0
2
3
Not relevant
Mark/space ratio preset
Via process data (cyclic)
Frequency preset
Via CoE (acyclic)
[20 Hz to 20 kHz] via process data 16-bit unsigned (cyclic), 1 digit = 1 µs period
[1 Hz to 20 kHz]
via process data 32-bit unsigned (cyclic), 1 digit = 1 µs period
Used if
only the mark/space ratio is to be changed quickly in the real-time context.
mark/space ratio and frequency are to be changed quickly in the real-time context.
mark/space ratio and frequency are to be changed quickly in the real-time context.
The frequency can be set to min. 1 Hz.
Operating
range
PWM 20 Hz..20 kHz
PWM 100 ns frequ. resolution
PWM 1 Hz..20 kHz
PWM 20 Hz
PWM 1 Hz..20 kHz
Period value from
Process data
Period unit
[1000 ns = 1 µs]
[100 ns]
[1000 ns = 1 µs]
Permissible value range
80..32657 (signed)
50..65535 (unsigned)
80..65535
50..1000000
0..65535 (only unsigned)
0..1000000
Frequency range
20 Hz..20 kHz
153 Hz..125 kHz
1 Hz..20 kHz
20 Hz..20 kHz
1 Hz..20 kHz

*The corresponding output frequency can be calculated from the period.

 
Impermissible values in the pulse width operation mode (standard), OP mode "100 ns"
If a value < 80 [*100 ns] is preset in the pulse width operation mode (standard), OP mode "100 ns", this cannot be processed.
If such an invalid value is entered, the EtherCAT device has to be started in the PREOP state and the CoE entry corrected in this state.