Siemens ET 200S - Reading the Diagnosis out Using STEP 7 and STEP 5

Commissioning and Diagnostics
6-26
Distributed I/O System ET 200S
EWA 4NEB 780 6024-02 07
6.6.1 Reading Out the Diagnosis
Length of the Diagnostic Message Frame
 The maximum message frame length for the ET 200S is as follows:
– IM151-1 BASIC: 43 bytes
– IM151-1 STANDARD, IM151-1 FO STANDARD, IM151-1 HIGH FEATURE
(DPV0 operation): 64 bytes
– IM151-1 HIGH FEATURE (DPV1 operation): 128 bytes
 The minimum frame length in the event of there being no errors is as follows:
– IM151-1 BASIC, IM151-1 HIGH FEATURE: 6 bytes (module diagnosis,
module status and channel-specific diagnosis disabled by parameter)
– IM151-1 STANDARD, IM151-1 FO STANDARD: 35 bytes
Ways of Reading the Diagnosis
Table 6-7 Reading the Diagnosis Out Using STEP 7 and STEP 5
Programmable Logic
Controller with DP
Master
Block or
Register in
STEP 7
Application See ...
SIMATIC S7/M7 “DP Slave
Diagnostics” tab
Slave diagnosis in plain-text form
on the STEP 7 user interface
The section on hardware
diagnostics in the STEP 7
online help system
SFC13
“DP NRM_DG”
Read out slave diagnosis
(store in data area of the user
program)
For the structure, see
Section 6.6.2; for SFC,
see the online help
system in STEP 7
SFC 59
“RD_REC”
Read data records of the S7
diagnosis (store in the data area of
the user program)
See the System and
Standard Functions
Reference Manual
SFB 52
“RDREC”
Read data records from the DP
slave
For SFB, see the STEP 7
online help system
(system functions/system
function blocks)
SFB 54
“RALRM”
1
Receive interrupts from the
interrupt OBs
For SFB, see the STEP 7
online help system
(system functions/system
function blocks)
SIMATIC S5 with
IM308-C as DP master
FB192 “IM308C” Read out slave diagnosis
(store in data area of the user
For the structure, see
Section 6.6.2; for FBs, see
SIMATIC S5 with the
S5-95U PLC as DP
master
FB230 “S_DIAG”
program) the ET 200 Distributed I/O
System Manual
1
Only with S7-400 as of V3.0 and with the CPU 318 as of V3.0