Siemens et 200sp - Page 57

Configuring/address space
4.2 Pulse width modulation PWM mode
Technology Module TM Pulse 2x24V (6ES7138‑6DB00‑0BB1)
56 Manual, 05/2019, A5E35061186-AB
Byte
offset
relative
to start
address
Channel
0/1
↓ ↓
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
9 21 Reserved DITHER SET_DQB SET_DQA Reserved TM_
CTRL_DQ
SW_
ENABLE
10 22 Reserved RES_
ERROR
11
23
Reserved
Note
Channel 1 is only available in two
-channel operation of the module.
Control bit/value
Explanations
OUTPUT_VALUE If you are not using current control, you specify the duty cycle (mark-to-space ratio, duty factor)
with this value. A changed duty cycle takes effect at the next rising edge at DQn.A.
If you are using current control, the module controls the duty cycle, and you specify the current
setpoint relative to the reference value current with OUTPUT_VALUE.
Value range of the duty cycle or current setpoint:
• Output format "1/100": 0 to 100
D
• Output format "1/1000": 0 to 1000
D
• Output format "1/10000": 0 to 10000
D
• Output format "S7 analog output": 0 ... 27648
D
If the setting is outside the value range, the ERR_OUT_VAL feedback bit is set and the maxi-
mum permissible value of the output format is used in each case.
SLOT You specify the load value with this value.
Value range:
• Period duration in μs: 10 to 85000000
D
• On delay in μs: 0 to 85000000
D
• Dithering ramp up/ramp down in ms: 0 to 30000
D
• Dithering amplitude in %: 0 to 500
D
• Dithering period duration in μs: 2000 to 100000
D
You specify whether to apply a change once or cyclically with MODE_SLOT.
Invalid values trigger setting of feedback bit ERR_LD (when MODE_SLOT = 0) or
ERR_SLOT_VAL (when MODE_SLOT = 1).