Safety network system and safety slave
First Claim
1. 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.
1 Assignment
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Accused Products
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.
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Citations
7 Claims
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1. A safety slave connectable to a safety network characterized by comprising:
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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. - View Dependent Claims (3, 4, 5)
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2. A safety slave connectable to a safety network characterized by comprising:
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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.
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6. A safety slave connectable to a safety network characterized by comprising:
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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.
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7. A safety slave connectable to a safety network characterized by comprising:
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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.
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Specification