Yaskawa 545 PLC User Manual

Page 12

OPERATION

PLC Gateway Display Messages

4/12/94

ELOA

When the PLC Gateway receives a logical output
allocation message from the DSD LAN, this error
message could appear for any of the following
reasons:

1. The internal allocation table is full and cannot

handle another allocation. The allocation table
has room for 1024 allocations. A logical
allocation uses 1 element in the table.

2. The bits specified in the allocation message

overlap with bits already allocated by
another node.

3. The bits specified by the allocation message

are not exactly the same as the bits already
allocated by this node.

EMMA

This indicates a mis-match during allocation.

Check the configuration in the
Texas Instruments PLC. For the base

When the PLC Gateway receives an allocation

and slot specified in the allocation

message (0x10, 0x11, 0x12, 0x13, or 0x2D) from the

message, the following modules are

network, it decodes the channel number into a base

expected in the allocation message:

and slot number and then requests through the
5136-TI card the configuration for that base from

0x10 -LOGO- 16X, 16 point

the Texas Instruments PLC. Once the configuration

Discrete Input Module

has been received, the gateway checks to make sure

0x11 -NUMO- 8WX, 8 channel

that the module in that slot is the correct one. If

not, then this message appears and an error

0x12 -LOGI- 16Y, 16 point

message is sent to the node that issued the

Discrete Output Module

allocation message.

0x13 -NUMI- 8WY, 8 channel

ENIA

When the PLC Gateway receives a numeric input
allocation message, this error message could appear
for one of the following reasons:

1. The internal allocation table is full and

cannot handle another allocation. The
table has room for 1024 allocations. A
numeric allocation uses 8 elements in
the table.

2. The sub channel is out of range. It can

range from 1 to 8.

Table 7. PLC Gateway Display Messages (Continued)

MESSAGE

DESCRIPTION

TROUBLESHOOTING

RD 3056-10