A "Configuration file exceeds the maximum length" error can occur in RSLogix Studio 5000 before all 500 bytes are used. Although, the HMS-EN2SE-R Serial Linking Device supports up to 500 bytes of Input data and 496 bytes of Output data, there is a limitation on the number of transactions it supports.
APPLICABLE PRODUCTS
Anybus Linking Device (HMS-EN2SE-R)
PRE-REQUISITES
RSLogix/Studio 5000 20.01 or greater
IN THIS ARTICLE
Issue:
RSLogix Error: “Configuration file exceeds maximum length. If possible, please combine transactions or exchange data transparently.”
Possible Causes:
1- More than 500 bytes of Input data or 496 bytes of Output data are being used.
2- There are too many transactions – the linking device theoretically supports up to 150 transactions, but the actual number may be less, depending on the memory requirements of the defined transactions. A Query/Response transaction uses the memory space of two transactions as there is a Query transaction and a Response transaction.
Troubleshooting Steps:
1- If too much data is being used, the only solution is to trim the amount until it is under the maximum space. If this cannot be done, a second linking device will have to be added for the extra data.
2- If the maximum data space is not being used, then there are too many transactions. Transactions where sequential memory space is being read or written to can be combined. Then transactions can split into separate tags either in the Process Tags Editor or in the PLC. For example, if there are 3 registers that are being read, 10 through 12, instead of using 3 transactions reading one word each, one transaction reading 3 words can be used instead.