CC-Link IE Safety Communication Function
Integrating safety communication on one network
A safety communication function realized on each network of CC-Link IE. CC-Link IE enables both safety and non-safety communications on the same network.
CC-Link IE Safety Communication Function Features
A safety communication function realized on each network of CC-Link IE
- With the high-speed of each CC-Link IE network, a safety system with high responsibility can be constructed.
Achieves a mixture of safety control in general control and motion control
- Safety control system can be introduced into general control and motion control system.
Based on an international standard of the safe communication
- CC-Link IE safety communication satisfies the requirements necessary for SIL3 compliance, which are indicated in IEC 61508.
Safe control and general control can be mixed
The CC-Link IE system that implements safety communication comprises CC-Link IE stations (IE safety stations) equipped with safety communication functions and CC-Link IE stations (IE standard stations) not equipped with safety communication functions. Fig. 1 shows an example of a configuration.
Fig. 1 CC-Link IE Configuration Example
*A specification that can also support CC-Link IE Controller Network and CC-Link IE Field Network.
Compatible standards
Table 1 shows the international safety standards corresponding to CC-Link IE safety communication function. CC-Link safety communication function satisfies the requirements necessary for SIL3 compliance, which are indicated in IEC 61508. In addition, CC-Link IE safety communication function follows the basic concept of functional safety communication defined in IEC 61784-3.
Table 1 Corresponding International Safety Standards
| Standard No. | Name | Safety Level |
|---|---|---|
| IEC61508:2010 | Functional safety standards for electrical/electronic/programmable electronic safety-related systems | SIL3 |
| IEC61784-3:2010, 2016, 2017, 2021 | Industrial communication networks – Profiles – Part 3: Functional safety fieldbuses | - |
Safety station internal
A safety stations connected to CC-Link IE Safety has IE safety communication layer. IE safety communication layer has one or more IESMAP (Master) and/or one or more IESSLP (Slave). IESMAP is a protocol machine establishing a safety connection with the IESSLP specified as its safety parameter and performing safety communication with the IESSLP. IESMAP always invokes a safety connection establishing process.
IESSLP is a protocol machine establishing a safety connection with the IESMAP sending a connection request from, and performing safety communication with the IESMAP.
IESMAP (IE Safety Master Protocol Machine)
Protocol machine establishing a safety connection with the IESSLP specified as its safety parameter after sending a connection request to the IESSLP; receiving a response from it; and confirming its identification, and performing safety communication with the IESSLP
IESSLP (IE Safety Slave Protocol Machine)
Protocol machine establishing a safety connection with the IESMAP sending a connection request from, and performing safety communication with the IESMAP
Specification
| Item | Specification |
|---|---|
| Communication method | Connection type |
| Max number of stations |
Dependent on CC-Link IE that serves as foundation: CC-Link IE TSN: 64770 CC-Link IE Controller Network: 120 CC-Link IE Field Network: 254 |
| Max number of safety connection for same stations | 2 |
| Max number of links of safety refresh | Input: 4-100 octets / Output: 4-100 octets |
| Safety Integrity Level (IEC61508) | SIL3 |