EL8601-8411 | 12-Channel multi-Interface, 8 x DI, 1 x CNT, 1 x ENC AB, 4 x DO, 2 x PWM, 1 x AI, 1 x AO · 0 次阅读

Specify pulse width (index 0x70n0:11 "PWM output")

The pulse-pause ratio (duty cycle) of the output signal can be specified via the pulse width in index 0x70n0:11 "PWM output". The pulse pause is calculated automatically as the difference to the 100% pulse duration.

The value range of the pulse width is determined via the user scale in index 0x80n0:12 "Gain" and index 0x80n0:11 "Offset".

Value range without user scale in the factory setting (default)
User scale is not enabled in the factory setting ("Enable user scale" = FALSE). No further user scale settings (0x80n0:12 "Gain"/0x80n0:11 "Offset") are required.
Value range: 0 ... FFFF_hex (65535_dec) for 0 ... 100% duty cycle
Set the value range via the user scale (see block diagram)

Enable user scale via index 0x80n0:01 "Enable user scale"
Set the desired value range via 0x80n0:11 "Offset" and 0x80n0:12 "Gain".

With:
Gain = 0x80n0:12 “User scale Gain”
Offset = 0x80n0:11 “User scale Offset”

Is the influence of user scale:

active: Ysc = Ys1 * Gain*2^-16 + Offset
inactive: Ysc = Ys1

Specify pulse width (index 0x70n0:11 "PWM output") 1:

Specify pulse-pause ratio (duty cycle) via 0x70n0:11 "PWM output"
The following table shows examples for setting the duty cycle without user scale (factory setting) and with user scale.

Desired pulse-pause ratio (Duty cycle)	Specification of the pulse width via 0x70n0:11 "PWM output"
Desired pulse-pause ratio (Duty cycle)	Value range without user scale 0x80n0:01 = FALSE (default)		Value range with user scale 0x80n0:01 = TRUE 0x80n0:11 = 0 (Default) 0x80n0:12 = 65536 (Default)
100%	FFFF_hex	65535_dec	2710_hex	10000_dec
75%	BFFE_hex	49150_dec	1D4C_hex	7500_dec
50%	7FFF_hex	32767_dec	1388_hex	5000_dec
25%	3FFF_hex	16383_dec	9C4_hex	2500_dec
10%	1996_hex	6550_dec	3E8_hex	1000_dec
0%	0000_hex	0_dec	0000_hex	0_dec