Product overview
EL6601, EL6614
24
Version: 4.2
Fig. 21: Notice on exceeding configured data volume
Note regarding the data quantity
The EL66xx (EL6601 from FW07, EL6614 from FW03) has an 8 kbyte data memory with the following
default allocation
Type
Usable extent
Operation mode
Allocated memory
Mailbox Out
1024 bytes
1024 bytes (fixed)
Mailbox in
1024 bytes
1024 bytes (fixed)
Publisher
1024 bytes
3-buffer mode
3072 bytes
Subscriber
1024 bytes
3-buffer mode
3072 bytes
If more publisher or subscriber data are required for an application, the SyncManagers can be modified
accordingly. The mailbox cannot be modified.
2.5.2
Settings in the System Manager
Appearance of the variables
Depending on the platform used (PC or EL66xx), the publisher/subscriber will appear differently. A
publisher/subscriber can be created:
• on a PC network interface, see
Beckhoff network variables - Settings [
• on an EL66xx
The following sample illustrates the setup for a publisher and a subscriber variable (each with a size of a 16-
bit word) on an EL6601 under TwinCAT 2.10.
Fig. 22: Network variable sample configuration on an EL6601