ICP DAS USA | PROFI-8455-G | Quick Start Guide | ICP DAS USA PROFI-8455-G Quick Start Guide

ICP DAS USA PROFI-8455-G Quick Start Guide
PROFI-8455 – PROFIBUS Remote I/O Unit
Quick Start User Guide
 Introduction
This user guide introduces the user how to implement the PROFI-8455
into their applications in a quick and easy way. Therefore, it only provides
the basic instructions. For more detail information about the PROFI-8455,
please refer to the PROFI-8455 user manual in the ICP DAS product CD or
download it from ICP DAS web site.
 PROFI-8455
Hardware Structure
Power Input
( Prog. DL.)
(Data Comm.)
I/O Expansion Slot
(Module Installation)
 PROFI-8455 Connector and Pin Assignment
Pin No.
Receive/Transmit data – plus
Power ground of active terminator
Power 5 volt of active terminator
Receive/Transmit data - minus
The PROFIBUS connector is a standard 9-pin D-Sub connector, there are
only 4 pins used in PROFI-8455. The pins VP and GND support the 5 volt
power to active terminal resistor, and the A-Line and B-Line is the data bus.
PROFI-8455 Remote I/O Unit Quick Start User Guide (Version 1.1, January/2007)
 Status Indicator
PROFI-8455 provide three types of status indicators, they are PWR LED
(yellow), ERR LED (red) and RUN LED (green).
Status Indicator
ERR Flash
(0.1 Sec)
ERR Flash
ERR Flash
(1 Sec)
PWR Flash
(1 Sec)
Recommend solution
PROFI-8455 is offline Check the address setting of
with no valid baud rate PROFI-8455 and DP-master.
(offline mode*)
PROFI-8455 detects
Check the DP-Master is
baud rate, but is still
ready to communicate with
offline.(stop mode*)
PROFI-8455 Prm is
Check the setting of
Fault.(Note 1)
PROFI-8455 in the master
interface and make sure of
the consistency.
PROFI-8455’s Cfg is
Same as above
fault(Note 2)
PROFI-8455 is in clear
Sets the DP-Master from
clear mode to operation
PROFI-8455 is in
operation mode*.
PROFI-8455 detect
Find the reason of the fault of
module(s) offline
corresponding module.
PROFI-8455 Remote I/O Unit Quick Start User Guide (Version 1.1, January/2007)
 Terminating Resistors
In order to minimize the reflection effect of the signal transmission,
PROFIBUS device has to fit with an active terminal resistor at both first
node and last node. The connection of active terminating resistors is shown
in above circuit diagram. The PROFI-8455 doesn’t have any terminating
resistors inside. Therefore, users must add the terminator in external. In
general, PROFIBUS connector has terminating resistors inside, and there
is a switch to control the ON/OFF of the terminating resistors, as shown
Terminator ON
Terminator OFF
Terminator Switch
PROFI-8455 Remote I/O Unit Quick Start User Guide (Version 1.1, January/2007)
 PROFI-8455 – Setting and Module Installation
The following steps can help users to set and apply the PROFI-8455.
1. Load GSD file into the DP-Master Configuring software
DP-Master configuring software (Siemens Step7 or
ProfiCaptain etc...) loads IPDS0B0C.gsd file, and make sure of
the “PROFI-8455” label in “I/O” category. Finally, Loading
PROFI-8455 into PROFIBUS at the software and activate it.
2. Select I/O modules
Choose PROFI-8455 and add I/O module that you want to use.
Modify the system parameter “WD_On”, “Freeze/Sync Req.”,
“Lock/Unlock Req”, “Group-ID assignment”, etc… (modify by
user’s preference)
3. Set Parameter Data
Wait parameterization is an important step before data
exchange. In this stage, DP-Master provides the essential
parameter to PROFI-8455 include user parameters and module
parameters. Therefore, it must finish this setting before data
1. User Parameter:
“User parameter” also called “system parameter” is the basic
parameters. The number of parameter is fixed regardless of the
number of modules. In PROFI-8455, there are two kinds of
parameter. They are Byte Order and Diagnosis Repot Period.
Byte-Order Parameter: If your system obeys the INTEL
data format, you should select Little-Endian mode; otherwise,
you should select Big-Endian mode.
Diagnosis Report Period Parameter: This parameter
dominates the time interval of each diagnostic message report.
The unit of this period is millisecond. The maximum time
interval is 65536 ms, the minimum is 0 ms.
2. Module Parameters:
The most of modules must be initialized before applying
them. Module parameters provide information about Operation
Code, Data Code or Enable Diagnosis, etc… Please refer to the
manual to know more information about these parameters.
4. Download Setting and Program into DP-Master
Users load the setting and program into DP-Master, and let it
Users must finish these steps before starting to communicate with
PROFI-8455 Remote I/O Unit Quick Start User Guide (Version 1.1, January/2007)
5. Module Installation:
In the expansion slots, users install the modules, and make
sure of correct installation. Notice that address mapping is order
by slot id of installed module (from left to right), and the
expansion slot that without module will be skipped.
6. Address Setting:
There are two hexadecimal rotary switches in PROFI-8455
panel. They dominate the address of PROFI-8455. The switch
labeled LSB is represented the low nibble of the address, and
the switch labeled MSB is represented the high nibble of the
address. For advance setting, please refer to PROFI-8455
User’s Manual.
After finishing the procedure, DP-Master will establish the connection
with PROFI-8455 and execute program automatically. RUN_LED indicates
the status of connection that you can observe.
 PROFI-8455 – state flow chart
The state machine of PROFI-8455 is shown below. If your PROFI-8455
can’t establish connection with DP-Master, you can see Q/A to solve it.
PROFI-8455 Remote I/O Unit Quick Start User Guide (Version 1.1, January/2007)
 PROFI-8455 – Q&A
1. Q: How do I know the status of the PROFI-8455?
A: You can observe the RUN LED in PROFI-8455 panel. If RUN LED
is light, data is exchanging. Otherwise it must be error in the
previous state. You can see Q&A 3 to solve it.
2. Q: Have I must set the PROFI-8455’s address before power
A: You can change the address after power applied, but you should
let the PROFI-8455 offline at least 5 second. After 5 second offline,
PROFI-8455 will reset by itself, and then apply the new setting of the
rotary switches.
3. Q: If PROFI-8455 couldn’t establish communication with DP-Master,
what can I do?
A: In General, the PROFI-8455’s error is due to the following
1. Parameter Fault- PROFI-8455’s ERR LED will have an interval of
0.5 second in each flash. It may reduce from “error module
2, Configuration Fault-PROFI-8455’s ERR LED will have an interval
of 1 second in each flash. It may reduce from “error installation
3, DP-Master OFFLINE-PROFI-8455’s ERR LED will light until
establish data exchange connection. You should switch DP-Master
status from OFFLINE to OPERATE.
4, DP-Master STOP-PROFI-8455’s ERR LED will flash quickly
(time interval may less then 0.5 second). You should switch
DP-Master status from STOP to OPERATE.
4. Q: Which Modules is faster among the same Module Number
(I-87017 and I-8017H)?
A: I-8K series is faster than I-87K series. It is due to the
communication interface, I-8K use Parallel interface, and I-87K use
the serial communication.
PROFI-8455 Remote I/O Unit Quick Start User Guide (Version 1.1, January/2007)
5. Q: I feel that the reaction time of analog module in I-87K is slow. Why
does it?
A: It is due to low sampling rate. Beside the I-87017 series module,
the remainder analog input module has sampling rate with 10Hz
maximum. If you want to use the high sampling module, I-8017H and
I-87017 is the best choice.
6. Q: how can I use the additional function of I-87082?
A: Please refer to the “Byte Order and Data Address” chapter in
the PROFI-8455 user’s manual.
PROFI-8455 Remote I/O Unit Quick Start User Guide (Version 1.1, January/2007)
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