Hello,
we have a little file system in our slave device which we access via FoE read requests. For small files there is no problem, but with larger files the transfer aborts after the 9th packet is send to the master but the master gives the error message Failed to write via FoE: FOE_MBOX_FETCH_ERROR The syslog log like that: Jun 2 09:33:42 syncat kernel: [228127.471701] EtherCAT ERROR 0-0: Data do not fit in receive buffer! Jun 2 09:33:42 syncat kernel: [228127.476400] EtherCAT ERROR 0-0: Corrupt mailbox response received! Jun 2 09:33:42 syncat kernel: [228127.476407] EtherCAT DEBUG: 00 14 00 04 22 02 01 00 08 00 00 00 73 20 65 74 Jun 2 09:33:42 syncat kernel: [228127.476413] EtherCAT DEBUG: 20 61 63 63 75 73 61 6D 20 65 74 20 6A 75 73 74 Jun 2 09:33:42 syncat kernel: [228127.476419] EtherCAT DEBUG: 6F 20 64 75 6F 20 64 6F 6C 6F 72 65 73 20 65 74 Jun 2 09:33:42 syncat kernel: [228127.476424] EtherCAT DEBUG: 20 65 61 20 72 65 62 75 6D 2E 20 53 74 65 74 20 Jun 2 09:33:42 syncat kernel: [228127.476429] EtherCAT DEBUG: 63 6C 69 74 61 0A 6B 61 73 64 20 67 75 62 65 72 Jun 2 09:33:42 syncat kernel: [228127.476434] EtherCAT DEBUG: 67 72 65 6E 2C 20 6E 6F 20 73 65 61 20 74 61 6B Jun 2 09:33:42 syncat kernel: [228127.476439] EtherCAT DEBUG: 69 6D 61 74 61 20 73 61 6E 63 74 75 73 20 65 73 Jun 2 09:33:42 syncat kernel: [228127.476444] EtherCAT DEBUG: 74 20 4C 6F 72 65 6D 20 69 70 73 75 6D 20 64 6F Jun 2 09:33:42 syncat kernel: [228127.476449] EtherCAT DEBUG: dropped 769 bytes Jun 2 09:33:42 syncat kernel: [228127.476451] EtherCAT DEBUG: 63 6F 6E 73 65 74 65 74 75 72 20 73 61 64 69 Jun 2 09:33:42 syncat kernel: [228127.476456] EtherCAT DEBUG: 70 73 63 69 6E 67 20 65 6C 69 74 72 2C 20 20 73 Jun 2 09:33:42 syncat kernel: [228127.476461] EtherCAT DEBUG: 65 64 20 64 69 61 6D 20 6E 6F 6E 75 6D 79 0A 65 Jun 2 09:33:42 syncat kernel: [228127.476466] EtherCAT DEBUG: 69 72 6D 6F 64 20 74 65 6D 70 6F 72 20 69 6E 76 Jun 2 09:33:42 syncat kernel: [228127.476471] EtherCAT DEBUG: 69 64 75 6E 74 20 75 74 20 6C 61 62 6F 72 65 20 Jun 2 09:33:42 syncat kernel: [228127.476476] EtherCAT DEBUG: 65 74 20 64 6F 6C 6F 72 65 20 6D 61 67 6E 61 20 Jun 2 09:33:42 syncat kernel: [228127.476481] EtherCAT DEBUG: 61 6C 69 71 75 79 61 6D 20 65 72 61 74 2C 20 73 Jun 2 09:33:42 syncat kernel: [228127.476486] EtherCAT DEBUG: 65 64 20 64 69 61 6D 0A 76 6F 6C 75 70 74 75 61 Jun 2 09:33:42 syncat kernel: [228127.476492] EtherCAT ERROR 0-0: Failed to handle FoE request. This is interesting since the packet is constructed the same as the previous 8 data packets (you can also take a look at the attached wireshark snippet). We tried different files and all files larger ~9k break at the 9th packet the same way. Our mailbox syncmanager for these tests has a size of 1024 bytes. We also tried to read the same file with TwinCAT and there we don't get this error. The file is completely downloaded. We use this fork of the Etherlab master which is in the low level still Version 1.5.2. https://github.com/synapticon/Etherlab_EtherCAT_Master For me it looks like a buffer filling up somewhere, but a first look into fsm_foe didn't show up something like that. Anybody has a idea where to look to solve this issue? Thanks, Frank -- *Frank Jeschke* Senior Software Developer ------------------------------ *Synapticon* | Robotic Control Systems Mobile: +49 173 / 3274611 Direct: +49 7031 / 30 478 - 29 Fax: +49 7031 / 30 478 - 99 *synapticon.com* <https://www.synapticon.com/> | Twitter <https://twitter.com/#!/synapticon_co> | Facebook <https://fb.com/Synapticon> Synapticon GmbH | Daimlerstraße 26 | 71101 Schönaich, Germany Secretary +49 7031 / 30 478 -0 | Managing Director: Nikolai Ensslen Amtsgericht Stuttgart HRB 756076 | USt-ID DE271647127 This message and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. Please notify the sender immediately if you have received this e-mail by mistake and delete it from your system.
2017-06-02-foe_read_9th_packet_error.pcapng
Description: Binary data
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