UM353-1B
Function Blocks
April 2012
3-5
The Cycle Time of the station can be viewed as a parameter within the STATN block. In addition, a bias can be
added to increase the total cycle time of the station. This may be necessary when significant communications
activities are taking place, causing communication overrun errors. Adding bias will allow the processor more time
during each scan cycle for completing the communication chores.
The station can be configured to time out of the configuration mode after 1 minute of no faceplate operations by
setting the CONFG TO parameter to YES (default).
Table 3-2 Modbus Port Baud Rate Parameters
PARAMETERS SETTINGS
Data Formatting
8 bits, no parity, and 1 stop bit
Baud Rate Selections
1 – 300
2 – 1200
3 – 2400
4 – 4800
5 – 9600 (default, rear port)
6 – 19200 (default, front port)
7 – 38400
Handshaking Selections
1.
No handshaking is used (default).
2.
The station port will turn on the RTS line when it’s ready to send data but will
not wait for a responding CTS from the receiving device.
3.
The station port will turn on the RTS line when it’s ready to send data and will
wait for a responding CTS from the receiving device before transmitting.
A list of the installed controller hardware and software can be viewed within the STATN block using the HW PRES
read only parameter. As shown in Table 3-3, each board has an ID and a hardware revision, and most also have a
software revision. The controller’s operating Kernel and operating code reside on the MPU Controller board and
there is an entry in the table for each. The table lists the hardware and software revisions. For example, in Table 3-
3, the MPU Controller board would be shown in the numeric display as ‘13 4.00’.
Table 3-3 Board Description and ID with Example Hardware and Software Revisions
BOARD DESCRIPTION
BOARD ID
HARDWARE
REVISION
SOFTWARE
REVISION
Kernel 0
3
2.00
MPU Controller
1
3
4.00
Display Assembly, Faceplate Display
2
1
4.00
I/O Expander
3
1
4.00
MultiMediaCard Installed
7
1
4.00
Check the NVRAM battery condition by reading the BAT OK parameter. The NVRAM, on the MPU Controller
Board, uses a sealed lithium battery. Typical battery life is 10-20 years, depending on the total power off time and
operating temperature of the controller. The battery powers the Clock and a portion of memory that stores operating
data when external power is removed from the controller. When external power is next applied, the controller will
read this data and return to the stored operating conditions, when a Hot start condition is encountered. The Clock
will retain the correct time. If the battery fails the station will power up in a Cold start using the controller
configuration stored in permanent FLASH memory and the Clock will be reset. Battery condition has no effect on
normal operation while external power is applied. The RTT function block includes a Battery Status output (BS)
that provides a high (1) signal when the battery is low.
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Страница 12: ...Contents UM353 1B x April 2012 ...
Страница 22: ...Introduction UM353 1B April 2012 1 10 ...
Страница 30: ...Configuration Overview UM353 1B April 2012 2 8 ...
Страница 122: ...Function Blocks UM353 1B April 2012 3 92 ...
Страница 168: ...Data Mapping UM353 1B April 2012 6 28 ...
Страница 204: ...Controller and System Test UM353 1B April 2012 9 8 ...
Страница 222: ...Calibration UM353 1B April 2012 11 4 ...
Страница 226: ...Circuit Description UM353 1B April 2012 12 4 ...
Страница 238: ...Model Designation and Specifications UM353 1B April 2012 13 12 EC Declaration of Conformity ...
Страница 239: ...UM353 1B Model Designation and Specifications April 2012 13 13 Annex A to the EC Declaration of Conformity ...
Страница 240: ...Model Designation and Specifications UM353 1B April 2012 13 14 ...
Страница 244: ...Abbreviations And Acronyms UM353 1B 14 4 April 2012 ...