SIMATIC S7-1200 Integrated technologies
Integrated technology for counting and measuring, closed-loop control and motion control make the SIMATIC S7-1200 an extremely versatile system for many types of automation tasks.
High-speed inputs and outputs
Up to six high-speed counters were integrated in the system, three with 100 kHz and three with 30 kHz. This enables precise monitoring of incremental encoders, frequency counting, and fast detection of process events. Two high-speed outputs were integrated in the SIMATIC S7-1200 controller as pulse outputs.
1211C, 1212C, 1214C with high-speed outputs to control speed, position
and duty cycles
The high-speed outputs of the SIMATIC S7-1200 controller can be used as pulse train outputs (PTO) and pulse width modulated (PWM) outputs. When configured as a PTO, a 50 percent duty cycle pulse train is provided at a rate of up to 100 kHz for the open-loop speed and position control of stepper motors and servo drives. When these Outputs are configured as a PWM output, a fixed cycle time output with a variable duty cycle controls can be used to control the speed of a motor or position a valve for instance.
1215C and 1217C high-speed outputs control speed, position and duty cycles
The SIMATIC CPU 1215C and CPU 1217C features six high-speed counters (HSC) build in – three with a clock rate of 100 kHz and another three with a clock rate of 30 kHz, using the readily available Signal Boards up to 200 kHz can be achieved as well. Furthermore there are four PTO outputs to control stepper drives simultaneously.
The new SIMATIC S7-1217C covers even more motion applications with the addition of the 5V Line Diver outputs.
PLCopen motion function blocks
The SIMATIC S7-1200 supports the open-loop speed and position control of stepper motors and servo drives. This functionality is easily configured using an axis technology object along with the internationally accepted PLCopen motion function blocks included within the engineering system SIMATIC STEP 7 Basic. Absolute, relative and velocity moves are supported in addition to home and jog functions.
Drive commissioning control panel
The drive commissioning control panel included with the engineering system SIMATIC STEP 7 Basic simplifies the start-up and commissioning of stepper motors and servo drives.
It provides both automatic and manual control of a single motion axis as well as online and diagnostics information.
PID functionality for closed-loop control
The SIMATIC S7-1200 supports up to 16 PID control loops for simple process control applications. These control loops are easily configured using a PID controller technology object and the supporting editors provided within the engineering system SIMATIC STEP 7 Basic. Additionally, the SIMATIC S7-1200 supports PID auto-tuning to automatically compute the optimum tuning values for the gain, integral time and derivative time.
PID commissioning control panel
The PID commissioning control panel included within SIMATIC STEP 7 Basic simplifies the loop tuning process. It provides both automatic tuning and manual control capabilities for a single control loop and it also provides a graphical trend view of the tuning process.