Siemens M200D 사용자 설명서

Diagnostics

7.3 Diagnostics via parameter channel (parameter echo)

M200D AS-Interface Basic

Manual, 03/2009, A5E01668085-01

7.3

Diagnostics via parameter channel (parameter echo)

Diagnostics (diagnostic message and diagnostic read procedure)

In the PLC, you can tell whether a fault has occurred by looking at the "I/O fault bit" (S1) on

the slave status tab page. The AS-i master enters the S1 value in the list of I/O faults (LPF)

that have been signaled. The PLC can read this list via the "GET_LPF" command and then

signal a specific diagnostic value from the slave.

Slave diagnostics echo (parameter echo)

Bit P0 defines whether a fault diagnosis (P0 = 1) or alarm/message diagnosis (P0 = 0) is

returned to the master as a slave response.
The parameter value (P0 = (0 / 1); P1 = x; P2 = x; P3 = x) is sent to the master via the

"Write_Parameter" command.

Note
In the parameter echo, only one fault or message is output at any one time; this is always the

one with the highest priority. No further messages/faults can be output while this

message/fault is present.

Call (master to slave):
P3

A/B

x (free)

Feedback (slave to master):

Parameter echo – alarms (A) / messages (M)
P3

Decimal Message / alarm

No alarm / message

(M) Thermal motor model deactivated

(M) Manual local control

(A) Prewarning limit of motor model exceeded

(M) Temperature sensor deactivated