Eurotherm L5211 User manual

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Copyright 1995 by Eurotherm Drives, Inc.
All rights strictly reserved. No part of this document may be stored in a retrieval system, or transmitted, in any form or by any means to
persons not employed by a Eurotherm group company without written permission from Eurotherm Drives, Inc.
Although every effort has been taken to ensure the accuracy of this specification, it may be necessary, without notice, to make
amendments or correct omissions in this document. Eurotherm Drives, Inc. cannot accept responsibility for damage, injury, or expenses
resulting therefrom.
Printed in the United States of America 0295 HA352201 Issue 2

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Only qualified personnel who thoroughly understand the operation of this equipment
and any associated machinery should install, start-up, or attempt maintenance of this
equipment. Non-compliance with this warning may result in serious personal injury
and/or equipment damage.
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Never work on any control equipment or motors without first removing all power
supplies from the equipment.
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This equipment contains ESD (Electrostatic Discharge) sensitive
parts. Observe static control precautions when handling, installing,
and servicing this device.
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This equipment was tested before it left our factory. However, before
installation and start up, inspect all equipment for transit damage,
loose parts, packing materials, etc.
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Ruptured semiconductor devices may release toxic materials. Con-
tact Eurotherm Drives or the semiconductor manufacturer for proper
disposal procedures for semiconductors or other material.
NOTE. The installation of this equipment must comply with the
National Electric Code and any applicable local codes.

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The L5211 VME gateway is a VME-based peripheral which allows a LINK network
to interface with any VME-based system. It is intended for use with industrial control
programmable logic controllers (PLC's), but may be used in any VME environment.
Two versions are available, one is intended for use in a standard VME backplane and
takes up one slot. The other installs directly into a G.E. Fanuc double-width slot.
Both versions function identically, but have different spare parts as listed in Appendix
A.

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The L5211 is essentially a dual ported, random access memory (RAM) which is
installed directly into the VME Bus and is interconnected to the LINK network. 32K
of RAM is available, much of which may be used by the VME programmer for
general purpose data storage. Future versions of the device may use more memory for
the intended functionality, that of passing data back and forth between the VME bus
and the LINK network.
0(025<
Memory is referenced from a "base", or starting address; that is, the lowest address
into which data may be stored. For the purposes of this discussion, the base address
will be referred to as $000 ($ specifies hexadecimal) . Refer to the installation
instruction section of this manual for details on how to set the base address. The
memory is configured in byte format.
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"Shared memory" is that portion of the 32K RAM that is accessed by both the VME
and the LINK network for purposes of communication. Shared memory presently
resides between $000 and $29F, and is broken up into six specific regions. These
regions, defined in Table 1, facilitate the transfer of bits, bytes, and words, from each
device to the other. Further, Flags are used to notify the receiving device that a
particular value has been changed.
'DWD $GGUHVV )ODJ %\WHV 7\SH 'LUHFWLRQ
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&  %   ) %\WH 90( WR /LQN
&  %   % :RUG 90( WR /LQN
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      %\WH /LQN WR 90(
     ) :RUG /LQN WR 90(
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The Flag bytes provide an efficient means of controlling the flow of data between the
two mediums. When data is written from one device to the other, the sending device
must set the appropriate bit in the Flag byte to notify the receiver of the change in
data. Therefore, simply scanning the flags allows the receiver a convenient means of
determining if data has been modified. The use of this feature is optional on data

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transfers from LINK to VME, but mandatory for VME to LINK. LINK will ignore any
writes until the appropriate flag bit is set. The VME may simply scan its inbound data
area and use or ignore the flags as it sees fit.
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The memory configuration allows for some combination of up to 96 each of bits,
bytes, or words to be transferred from each device to the other. The actual total
number of parameters is limited by the configuration space available. For VME to
LINK transfers, eight unique bits may be stored at locations $000 through $00B for a
total of 96 unique bits. 96 sequential locations are provided between $00C and $06B
for bytes, and 192 sequential locations are provided between $06C and $12B for 96
words. An identical set of memory locations exist for LINK to VME transfers.
Flag bits correspond to the associated data bit, byte, or word in bit-logical order,
hence bit zero of the first flag byte points to the first of the 96 entities. Bit zero of the
second flag byte points to the ninth of the 96 entities, and so forth. Logically, there is
a one to one correlation between flag bits and the bit data area as shown below.
Throughout this discussion, the "first" entity is referred to as bit 0, byte 0 or word 0.
Figure 1 defines the flag bits that correspond to the first eight data bits for bit transfers
from VME to LINK. By logical extension, the Flag byte at $259, bit 0 refers to data
bit 8 at address $001.
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'DWD ELW  DGGUHVV 
'DWD ELW  DGGUHVV 
'DWD ELW  DGGUHVV 
'DWD ELW  DGGUHVV 
'DWD ELW  DGGUHVV 
'DWD ELW  DGGUHVV 
'DWD ELW  DGGUHVV 
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Figure 2 defines the flag bits that correspond to the first eight data bytes for byte
transfers from LINK to VME. By logical extension, the Flag byte at $289, bit 0 refers
to byte address $140.
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%\WH  DGGUHVV 
%\WH  DGGUHVV 
%\WH  DGGUHVV $
%\WH  DGGUHVV %
%\WH  DGGUHVV &
%\WH  DGGUHVV '
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%\WH  DGGUHVV )
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Figure 3 defines the flag bits that correspond to the first eight data words for word
transfers from VME to LINK. By logical extension, the flag byte at $271, bit 0 refers
to word 8 which resides at addresses $07C, $07D.
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:RUG  DGGUHVV &'
:RUG  DGGUHVV ()
:RUG  DGGUHVV 
:RUG  DGGUHVV 
:RUG  DGGUHVV 
:RUG  DGGUHVV 
:RUG  DGGUHVV 
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When a write operation is performed from the VME to LINK, the VME side writes the
data (bit, byte or word), then sets the appropriate flag bit. When LINK finds the flag
bit set, it inputs the data, then clears the flag bit. The VME may use this as a
handshake signal if so desired.

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For data transfers from LINK to the VME, LINK writes the appropriate datum and sets
the flag bit, but thereafter ignores the flag until the next write to the same location. In
this manner, the VME programmer is afforded the maximum flexibility in the software
design. The "current" value in a relevant location can be scanned and treated as
current, or the flags can be used to look for data that has been changed since the last
check of the flags.
Note. Throughout the balance of this manual, writes and reads will be
referenced by address and by flag byte in the following manner:
Write word 1 ($19A) and set Flag $294.1
This example defines a transfer from LINK to the VME, which is
specified by the location in memory affected. It affects the second
word (from word zero), and sets the Flag bit 1 (second bit) in address
$294.

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Using LINK tools, configurations may be prepared and loaded into the L5211. Please
refer to the ConfigEd manual RG350672 for details. The cable provided with the
ConfigEd software package connects between the L5211 at the jack labeled RTNX on
the end panel and your computer's serial port.
To provide a convenient means of getting familiar with the L5211, a simple
configuration is loaded into it prior to shipping. This configuration is illustrated in
Figure 4.
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NOTE. The input and output channels must be numbered sequentially
starting at 1. ConfigEd will number the entries correctly but if the
user edits the configuration (by adding or deleting entries in the
handler) the numbers may get out of sequence. Figure 5 shows the
Input Handler with correct sequencing and the Output Handler with
incorrect sequencing.
The configuration increments a 16 bit unsigned word (ordinal type), and writes it to
word 2 ($19C) and sets Flag $294.2. It is incremented every 100 ms, hence the
L5211 initiates a write cycle approximately every 100 ms, depending on how often
the VME accesses the memory. The ordinal word starts at zero upon L5211
initialization, and rolls over at 32,767.
The VME may set the counter to a specific value at any time by writing word 1
($06E) and setting Flag $270.1. It may also write word 0 ($06C and set Flag $270.0).
The L5211 will echo the value by writing word 0 ($198) and setting Flag $294.0, and
will also take the value, compute 33.333% of it, and write it to word 1 ($19A) and set
Flag $294.1.
Using this configuration, the programmer may test software that waits for an event to
occur (counter incremented), or may initiate a transfer and see specific, quantifiable
results immediately (setting the counter, or looking for the value written to be echoed
and a math function to be accomplished).