Chapter 2 Application Example - Mitsubishi Electric MELSEC-QS Series Safety Application Manual

2
APPLICATION EXAMPLE

CHAPTER 2 APPLICATION EXAMPLE

(1) When performing safety control for the entire line using a single safety
Integrated control panel
MELSECNET/H(10),
(Communication between
Line integrated control
MELSECNET/H
Safety
programmable
controller
(Safety control)
Standard input
Body welding line
Figure 2.1 Safety control for the entire line using a single safety programmable controller
2
- 1
programmable controller
The application image for the car welding line is shown as an application example of
the safety programmable controller in Figure 2.1.
A safety application operated by the safety programmable controller is configured for
the following purposes:
• When safety is ensured using the safe state signal, power is supplied to robots.
• When safety is not ensured using the safe state signal, the power is cut off.
• The safe state signal can be checked using an emergency stop switch or a light
curtain.
The safety programmable controller operates as follows:
• Connect a safe state signal to the CC-Link Safety remote I/O module.
• The CC-Link Safety remote I/O module sends the safe state signal to the safety
CPU module. The safety CPU module processes the received signal in the
sequence program, and sends a safety output to the CC-Link Safety remote I/O
module.
• The safety output cuts off the power to the robots.
First process
Ethernet, etc.
standard CPUs)
Line control network
Safety input
CC-Link Safety
remote I/O module
Standard output
Restart Emergency
switch stop switch
Second process
Process control CPU
Line control network
Safety input
CC-Link Safety
remote I/O module
Warning Light curtain
light
n-th process
Line control network
CC-Link Safety
remote I/O module
Safety output
Robot Robot