User manual

ManualsBrandsRadiSys ManualsChassis6200plus Series

Chapter 1

Overview

1-10

able 1.B

Comparison

of 6008-LTV and PLC-5/VME Processor Attributes

Attributes 6008-LTV PLC-5/VME Comments

VME slots 3 2

Bus arbitration No Yes or No (user configurable) Single level arbiter

VME master Yes Yes

VME Slave Yes Yes

Global memory (bytes)

1K short, 4K short or standard 64K standard Global memory is selectable

Programming and downloading

over backplane

No Yes With 6200 series software

release 4.4 and later

Saving over backplane No Yes With 6200 series software

release 4.5 and later

PLC



data table to global memory trans-

fer method

Continuous-copy command Continuous-copy and/or ladder

MSG commands

Asserts VME SYSFAIL Yes Yes

PLC resets upon VME SYSRESET Yes Yes

Bus request line 0, 1, 2, 3 1, 3

Bus release ROR, RWD, ROC ROR, RWD, ROC

Continuous-copy command file size 500 words 1000 words

Ladder MSG file size N/A 1000 words

RS-232 port No Yes

Remote I/O baud rate 57.6k baud fixed 57.6k, 115.2k, 230.4k baud configurable

Remote I/O fractional rack addressing No Yes

All

of the 6008-L

TV’

s global memory could be configured to be totally within short memory

. Because the PLC-5/VME processor

’s global memory would totally fill all of

VME short memory

, it can only be selected with a standard memory address. This may be a consideration when replacing a 6008-LTV with a PLC-5/VME processor

There are some areas of potential incompatibility to consider:

The configuration/control/status/message registers are slightly different,

requiring changes to the host driver program.

The LTV VME global memory can be selected to be in short or standard

memory space. The PLC-5/VME processor’s global memory can only

be selected to be in standard memory. Because of this, the 6008-LTV

will accept address modifiers 2D, 3D 29 and 39. The PLC-5/VME

processor will only respond to address modifiers 3D.

The 6008-LTV supports logical rack address 0; the PLC-5/VME

processor does not.

The 6008-LTV has a status/configuration bit to enable or ignore ROC

(release on clear). The PLC-5/VME processor will always respond

to ROC.