Siemens Simatic S7-1500 User Manual

Technology functions
3.2 Pulse generators
CPU 1512C-1 PN (6ES7512-1CK00-0AB0)
Manual, 09/2016, A5E35306440-AB
61
3.2.2.2
Function: Direct control of the pulse output (DQA)
Direct control of the pulse output (DQA)
In the modes "Pulse width modulation PWM" and "Frequency output", you can set the pulse
output (DQA) of a pulse generator directly via the control program. Select the function for the
DQ direct control by deleting the output control bit of the PWM channel (TM_CTRL_DQ = 0)
in the control interface.
The direct control of the pulse output (DQA) can be helpful when commissioning a control
system for automation.
When you select the direct control of the pulse output (DQA) during a pulse output
sequence, the sequence continues to run in the background so that the output sequence is
continued as soon as the channel takes control again (by setting TM_CTRL_DQ = 1).
You assign the status of the pulse output (DQA) using the control bits SET_DQA.
When you set TM_CTRL_DQ = 1, you deselect the direct control of the pulse output (DQA)
and the channel takes over the processing. If the output sequence is still running
(STS_ENABLE still active), the PWM channel takes over the control of the output again. If
TM_CTRL_DQ = 1 and STS_ENABLE is not active, the module's channel also takes over
processing, but then outputs "0".
Note
Output signal TM_CTRL_DQ of the PWM channel
•
If TM_CTRL_DQ = 1, the technology function takes over the control and generates pulse
sequences at the output PWM DQA.
•
If TM_CTRL_DQ = 0, the user program takes over the control and the user can set the
PWM DQA directly using the control bits SET_DQA.

Siemens Simatic S7-1500 Specifications

General

Protection Class	IP20
Programming Language	LAD, FBD, STL, SCL, GRAPH
Communication Interfaces	PROFINET, PROFIBUS, Ethernet, OPC UA
Memory	Work memory and load memory (integrated or external memory card)
I/O Modules	Digital I/O, Analog I/O, Technology modules, Communication modules
Safety Integrated	Yes (with fail-safe CPUs and modules)
Redundancy	CPU redundancy possible with specific CPU types
Temperature Range	0°C to 60°C (horizontal installation)
Digital Inputs	Scalable through digital input modules
Digital Outputs	Scalable through digital output modules
Analog Inputs	Scalable through analog input modules
Analog Outputs	Scalable through analog output modules
Backplane	Integrated backplane for module connection
Real-time clock	Integrated real-time clock
CPU Type	Various models available (e.g., CPU 1511-1 PN, CPU 1513-1 PN, CPU 1515-2 PN, CPU 1517-3 PN, CPU 1518-4 PN/DP)