Function: High-Speed Output - Siemens SIMATIC ET 200SP Manual

Modes and Functions

3.8 Function: High-speed output

3.8 Function: High-speed output
High-speed mode improves the signal timing of the DQ digital outputs. The switching edges
have less delay, variation, jitter, and smaller rise/fall times.
High-speed mode is designed to produce more precise timing for pulse signals, but provides
less maximum load current.
High-speed output is only available in dual channel operation; it is not available in single
channel operation.
You can use the STEP 7 (TIA Portal) or STEP 7 hardware configuration to select "High-
speed output (0.1 A)" option for each channel separately. Also, you can change the
parameter assignment at runtime with your program using data record 128 (Page 138).
STEP 7 (TIA Portal) and STEP 7 assist you during parameter assignment, by disabling
keyboard input for invalid parameters and range checking your value assignments.
Depending on previous parameter selections, other options will be disabled. For example, if
you select the single channel operation (the parallel connection of the two output channels),
then the parameter options for Channel 1 and high-speed output are disabled.
High-speed output option is available for these operation modes:
● Pulse output
● PWM
● Pulse train
● On/Off-delay
● Frequency output
High-speed output is not available in DC motor mode.
High-speed output option
Pulse timing
Pulse duration 10 μs
Period duration 100 μs
On-delay 0 μs
Off-delay
Frequency 0.02 Hz
High-speed output load current
Parallel mode
(single channel operation)
Disabled
Enabled
74
Minimum
High-speed
disabled
1.5 μs
10 μs
High-speed High-speed
enabled
85,000,000 μs
10 kHz
Maximum pulse output load current
High-speed disabled
2 A (Two channels)
4 A (One channel)
Technology module TM Pulse 2x24V (6ES7138‑6DB00‑0BB1)
Maximum
High-speed
disabled enabled
100 kHz
High-speed enabled
100 mA (Two channels)
Not allowed
Manual, 09/2015, A5E35061186-AA