Safety network system and safety slave
AssigneeOMRON Corporation
InventorsYasuo Muneta, Toshiyuki Nakamura
Life of this patent
Estimating the term…
Abstract
A safety PLC 1 serving as a master and a safety slave 2 are connected through a safety network 3 to constitute a network system. The safety slave has non-safety information storing unit 26 for storing individual information and a state information of the connected safety device, the state information monitors a state of the operating safety device and a stored content is updated based on its monitored result. Then, when the non-safety information satisfying a fixed condition, at least the non-safety information satisfied the condition is transmitted to the safety PLC. That processing is performed by an MPU 23. Thus, unnecessary non-safety information is not transmitted.
Claims7
A safety slave connectable to a safety network characterized by comprising:
- a safety information transmitting function of transmitting safety information determining a safety state or not, corresponding to a demand transmitted from a safety controller through the safety network;
- non-safety information storing means for storing non-safety information about the safety slave;
- and
- a function of transmitting at least the non-safety information which satisfies a fixed condition to the safety controller when the non-safety information stored in the non-safety information storing means satisfies the fixed condition.
A safety slave connectable to a safety network characterized by comprising:
- a safety information transmitting function of transmitting safety information determining a safety state or not, corresponding to a demand transmitted from a safety controller through the safety network;
- non-safety information storing means for storing non-safety information about the safety slave;
- storing means for storing a condition for transmitting the non-safety information;
- monitoring means for determining whether the non-safety information stored in the non-safety information satisfies the condition or not;
- and
- determining means for determining a transmission timing based on a monitored result of the monitoring means.
A safety slave connectable to a safety network characterized by comprising:
- a safety information transmitting function of transmitting safety information determining a safety state or not, corresponding to a demand transmitted from another node through the safety network;
- non-safety information storing means for storing non-safety information about the safety slave;
- and
- a function of transmitting at least the non-safety information which satisfies a fixed condition to the other node when the non-safety information stored in the non-safety information storing means satisfies the fixed condition.
A safety slave connectable to a safety network characterized by comprising:
- a safety information transmitting function of transmitting safety information determining a safety state or not, when a transmission condition is satisfied;
- non-safety information storing means for storing non-safety information about the safety slave;
- and
- a function of transmitting at least the non-safety information which satisfies a fixed condition to the other node connected to the safety network when the non-safety information stored in the non-safety information storing means satisfies the fixed condition.
Dependencies are inferred from the claim text.