40
CT-600-2
9.9
Recovery of data logs
The most relevant signals regarding the operation of the system are logged with an interval of 5 seconds and
the data logs are stored on the secondary SD-card in the HMI. Data can be accessed either via remote
access through Webgate, or by copying data from the SD-card to a PC.
The SD-card is located at the rear of the HMI under the cover marked “SD-CARD”. It can be removed
temporarily to copy data log files to a PC. If the data-logs need to be removed completely (clean history),
then the SD-card can be formatted (FAT-32) prior to being inserted into the HMI. Careful: all historical data
will be removed after format of SD-card!
Section 10.14 describes how to gain remote access through Webgate. From the Webgate main page, select
“Maintenance”, then “Data Secondary”. The folder structure as on the SD-card will be shown. Use following
two folders to find relevant data-logs:
Alarm, contains subfolders with csv-files for the alarm, warning and event logs.
Log,
contains subfolders with dat-files for logged data signals. The logged signals are the same as
those that can be shown as trend curves on the HMI (see section 10.8). Schneider Vijeo
Designer Data Manager (software available from Schneider) is needed to read and convert the
dat-files on a PC.
9.10
Configure communication with SCADA system over Modbus
The ACP LINK PLC has a list of signals, including status of the warnings and alarms accessible over
Modbus TCP/IP. For this purpose the Ethernet 1 connection on the PLC must be used. The available signals
on this Modbus are refreshed every 2 seconds.
The equipment to read the signals must be configured according to below Schneider Modbus communication
settings.
Parameter
Setting
IP address
Same range as IP address of ACP LINK PLC
Unit ID
255
Secondary Connection
Disabled
IP Protocol
TCP
Preferred frame length
120 bytes
IEC 61131 Syntax
Enabled
Addressing Mode
0-based
Double Word word order
Low word first
ASCII Display byte order
Low byte first
Port
502
First Register
40000
Function code
3 (read holding register)
Register size
16 bit
All data is stored as 32 bit floating number, each consisting of two 16 bit registers. The alarms are stored
according to the alarm number order in the first 16 Words (MW40000 to MW 40015), with one alarm status
per bit. The warnings are stored correspondingly in the next 16 Words (MW40016 to MW40031).
There are reserved 256 data signals, that are stored as 32 bit REAL numbers in the next 512 Words (MW
40032 to MW40542). See section 13.1 for default Ethernet parameters of PLC and section 15 for a complete
list of all signals and register addresses, available on Modbus TCP/P.
