Ebro EP 501 B Guide Rapide page 9

Type EP 501 B
Systemdescription
5.3.4 Sequence of communication for the profile
version S-7.A.5
1. After the start-up, the AS interface master (from master class 4)
automatically replaces the ID object with the S-7.A.5 slave.
Master sends 3 bytes:
1. Byte 2. Byte
Code = 16 dez Index = 0 dez
S-7.A.5 slave answers with 6 bytes
1. Byte 2. Byte 3. Byte
Code Vendor Vendor
ID (high) ID (low)
= 80 dez = 120 dez
or with 2 bytes (Read Response not OK)
1. Byte 2. Byte
Code Error code
= =
144 dez 0 dez 1 dez
(no error) (illegal
index)
3. Byte
Length = 5 dez
4. Byte 5. Byte 6. Byte
Device Device 1 word
ID (high) ID (low) output +
1 word
input
= 1 dez = 34 dez
2 dez 3 dez 4 dez
(illegal (request (busy)
length) not imple-
mented)
2. After that, the following cyclical commands can be used:
Code = 0 (get cyclic data from slave)
→ for status feedback 0 ... 100 %
Code = 1 (put cyclic data to slave)
→ for set-point value 0 ... 100 %
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