IEC 61158-4/COR1:2004 Corrigendum 1 - Digital data communications for measurement and control - Fieldbus for use in industrial control systems - Part 4: Data link protocol specification
Scope and object OverviewThe Fieldbus Data Link Layer provides basic time-critical messaging communications between devices in an automation environment. The purpose of this part of IEC 61 158 is to define eight distinct and non-interoperable fieldbus Data Link protocols. Each protocol defined in this part of this standard is most closely related to@ and lies within the field of application of@ the corresponding services of IEC 61 158-3@ the fieldbus Data Link Service Definition. The eight distinct protocols are the following:Type 1 - A DL-protocol for the Type 1 DL-service. The maximum system size is 56k links of 232 nodes@ each with 240 DLSAP-addresses and related peer and publisher DLCEPs@ plus another 768 link-wide group DL-addresses per link@ plus another 256 DLSAP-addresses and 2816 peer and publisher DLCEPs per link which can be allocated among the link??s nodes@ plus 227 group DL-addresses for the extended link. Fewer links or nodes permits an increase in the number of DLSAP-addresses and related DLCEPs. Type 2 - A DL-protocol for the Type 2 DL-service. The maximum system size is an unlimited number of links of 99 nodes@ each with 255 DLSAP-addresses. Each link has a maximum of 224 related peer and publisher DLCEPs. Type 3 - A DL-protocol for the Type 3 DL-service. The maximum system size is an unlimited number of links of 127 nodes@ each with 66 DLSAP-addresses. Type 4 - A DL-protocol for the Type 4 DL-service. The maximum system size is a single link with a virtually unlimited number of nodes@ each with 256 DLSAP-addresses connected to a single DLS-user. Type 5 - A second DL-protocol for the Type 1 DL-service. The maximum system size for this protocol is 240 links of 240 nodes@ each with 216 DLSAP-addresses and related peer and publisher DLCEPs@ plus another 227 link-wide group DL-addresses per link@ plus 227 group DL-addresses for the extended link. A normative specification of this protocol was not available at the time of compilation of this edition. Type 6 - A DL-protocol for the Type 6 DL-service. The maximum system size is a six-deep hierarchy of bridges for a total of 2406 links@ each of 240 nodes@ where each node has 240 DLSAP-addresses and over 60k related peer and publisher DLCEPs@ plus 16 group- DL-addresses and 4k peer and publisher DLCEPs per link which can be allocated among the link??s nodes@ plus a very large number of group DL-addresses for each hierarchical subtree of the extended link. Type 7 - A DL-protocol for the Type 7 DL-service. The maximum system size is 126 links of 256 nodes@ each with 16 DLSAP-addresses and 16 group DL-addresses@ plus another 28k DLSAP-addresses and related peer and publisher DLCEPs per link which can be allocated among the link??s nodes@ plus another 28k link-wide group DL-addresses per link@ plus 223 group DL-addresses for the extended link.Type 8 - A DL-protocol for the Type 8 DL-service. The maximum system size is 1 link of 256 nodes with preconfigured DLCEPs.
IEC 61158-4/COR1:2004 history
1970IEC 61158-4:2003/COR1:2004 Corrigendum 1 - Digital data communications for measurement and control - Fieldbus for use in industrial control systems - Part 4: Data link protocol specification
2003IEC 61158-4:2003 Digital data communication for measurement and control - Fieldbus for use in industrial control systems - Part 4: Data link protocol specification
2000IEC 61158-4:2000 Digital data communications for measurement and control - Fieldbus for use in industrial control systems - Part 4: Data Link protocol specification