BS EN 62056-21-2002 电度表.电度表读数,计价和负载控制的数据交换.直接地方性数据交换

标准号：BS EN 62056-21-2002
中文标准名称：电度表.电度表读数,计价和负载控制的数据交换.直接地方性数据交换
英文标准名称：Electricity metering - Data exchange for meter reading, tariff and load control - Direct local data exchange
标准类型：N22
发布日期：2002/7/17 12:00:00
实施日期：2002/7/17 12:00:00
中国标准分类号：N22
国际标准分类号：35.240.60;91.140.50
适用范围：This part of IEC 62056 describes hardware and protocol specifications for local meter data exchange. In such systems, a hand-held unit (HHU) or a unit with equivalent functions is connected to a tariff device or a group of devices. The connection can be permanent or disconnectable using an optical or electrical coupling. An electrical interface is proposed for use with a permanent connection, or when more than one tariff device needs to be read at one site. The optical coupler should be easily disconnectable to enable data collection via an HHU. The protocol permits reading and programming of tariff devices. It is designed to be particularly suitable for the environment of electricity metering, especially as regards electrical isolation and data security. While the protocol is well-defined, its use and application are left to the user. This standard is based on the reference model for communication in open systems. It is enhanced by further elements such as an optical interface, protocol controlled baud rate switchover, data transmission without acknowledgement of receipt. The protocol offers several modes for implementation in the tariff device. The HHU or equivalent unit acts as a master while the tariff device acts as a slave in protocol modes A to D. In protocol mode E, the HHU acts as a client and the tariff device acts as a server. As several systems are in practical use already, particular care was taken to maintain compatibility with existing systems and/or system components and their relevant protocols.