Installation manual

Publication 1747-RM001G-EN-P - November 2008
SLC 5/03 (OS30x), SLC 5/04 (OS40x) and SLC 5/05 (OS50x) Firmware History A-7
In the previous release, it took 60 μsec when saving interrupt
information at the end of scan. This has been improved to
40 μsec.
• Improve Accuracy of Last Scan Time
• Autoload Memory Module Program
In the previous release, when the bit S2:1/10 (Load Memory Module on
Memory Error bit) is set, if the processor has a hardware error of 0x01
at power up, the program in a memory module can be automatically
transferred from memory to the processor. In the current release, when
the bit S2:1/10 (Load Memory Module on Memory Error bit) is set, if
the processor has a hardware error of 0x01 to 0x0F at power up, the
program in a memory module can be automatically transferred from
memory to the processor.
OS501, Series A, FRN 5
released: April 1999
Enhancements
Multi-hop Messaging
Support was added for sending messages to and receiving messages
from ControlLogix Ethernet cards.
OS302, Series C, FRN 3
OS401, Series C, FRN 3
OS501, Series C, FRN 3
released: September 2000
Enhancements
• Added Block Transfer Instructions (BTR and BTW)
With block-transfer instructions, you can transfer up to 64 words to or
from a remote device over an Allen-Bradley RIO link. A Block Transfer
Read (BTR) is used when a remote device transfers data to the SLC. A
Block Transfer Write (BTW) is used when an SLC processor writes data
to a remote device. The RIO scanners (1747-SN and 1747-BSN)
perform block transfer through M0 and M1 files buffers.
A BTR or BTW instruction writes information into its control structure
address (a three-word control file) when the instruction is entered. The
processor uses these values to execute the transfer.
• Read High Speed Clock Instruction (RHC)
The SLC processor maintains a 10μS long integer free running
clock/counter. This 20-bit value increments every 10uS. It is accessed
using the RHC instruction. When the RHC is evaluated with a false rung
state, during prescan, or inside of a false MCR zone, no operation is
performed. When the RHC is evaluated with a true rungstate, the