Hitachi Hidic EH-150 Applications Manual page 59

Preliminary Rev.03
7.3 Automatic data transmission with user program
Without any user program, EH-ETH is able to send / receive data by using cyclic sending and receiving
function. In addition to this function, you can achieve more precise data transmission by using above function
with user program.
Sending
Communication type
Cyclic sending
Cyclic sending
Event sending
Receiving
Communication type
Automatic receiving
Automatic receiving
*1: Program for error detection of communication or other additional operation is
required depending on the occasions.
In case of using an additional program, there are two modes available, Optional sending and Optional
receiving.
Optional sending
Enable : Data on cyclic sending is refreshed always.
Disable : Data on cyclic sending is refreshed upon request from user program.
Optional receiving
Enable : Data on cyclic receiving is refreshed always.
Disable : Data on cyclic receiving is refreshed upon request from user program.
Besides above, Event sending is available, which is able to send data upon requested timing.
- Description in this manual might be modified without notice.
Table 7.3.1 Function of communication
Optional control
Enable
Disable
None
Optional control
Enable
Disable
7-12
Chapter 7 Automatic data transmission
User program
Required
*1
Not required
Required
User program
Required
*1
Not required