IFM Ecomat 300 AC1355, Supplementary Device Manual

Page: 66 / 248

DP module 7: Command channel
Module 7, command 13dec (0Dhex):
read telegram error counter
8-14
8.13 Module 7, command 13
dec
(0D
hex
):
read telegram error counter
Structure
Request of DP master
Bit
MM = master no. (1…2)
Byte
7 6 5 4 3 2 1 0
1
0 0 0D
hex
X = slave type (0…1)
0 = standard / A slave
1 = B slave
2
MM X SSSSS
SSSSS = slave no. (0…31
dec
)
3
0
not used *)
4
0
not used *)
Response from controllere
Bit
Byte
7 6 5 4 3 2 1 0
1
D7 D6 0D
hex
2
copy of the request
D6 = command code
D7 = error code
→ page 7-20 , table at the bottom
3
error counter high byte
4
error counter low byte
provides the number of errors during the exchange of data
between the slave and the master since power on or reset
Example: read telegram error counter of slave 1 on AS-i master 1
Request of DP master
Byte no. Value [hex] Description
1 0D 0D = command 13
2 41
(slave no.
1
)
+ (master no.
1 * 64
)
+ (32, if B slave)
= 65
dec
=
41
hex
3 00 not used *)
4 00 not used *)
Response from controllere
Byte no. Value [hex] Description
1 0D copy of the request
2 41 copy of the request
3 00
4 20
hex
= 32
dec
error counter = 0020
hex
= 0032
dec
→
Since the last power-on of the controllere or reset of the
counter 32 faulty telegrams have occurred during data exchange.
*)
IMPORTANT:
For the query read only the required bytes. Unused bytes can contain information of
previous queries.