User manual

Chapter 6
PLC-5/VME Processor
Communications Commands
6-3
All PCCCs supported by the PLC-5 processor are supported by the
PLC-5/VME processor. Since only a subset are useful to driver programs,
only the useful subset and the PCCCs compatible with the “selective
commands” of the 6008-LTV processor are described here.
PCCC Name 6008-LTV Processor
(Equivalent Name)
Command FNC Page Sample
Echo Echo 06H 00H 6-5 B-59
Identify host and status Identify PLC-5/VME
processor, report status
06 03 6-6 B-67
Read-modify-write Write bit 0F 26 6-8 B-76
Typed read Read block 0F 68 6-10
Typed write Write block 0F 67 6-18
Set CPU mode Set processor mode 0F 3A 6-20 B-84
Upload all requests Set upload privilege 0F 53 6-21 B-87
Download all requests Set download privilege 0F 50 6-23 B-53
Upload complete Restart after upload 0F 55 6-24 B-50
Download complete Restart after download 0F 52 6-25 B-56
Read bytes physical Physical read 0F 17 6-26 B-70
Write bytes physical Physical write 0F 18 6-27 B-44
Get edit resource 0F 11 6-29 B-62
Return edit resource 0F 12 6-30 B-73
Apply port configuration 0F 8F 6-31 B-47
Restore port configuration 0F 90 6-32 B-81
Status codes returned in the reply packet are not defined for each PCCC,
but they are listed together in a subsequent section.
Some PCCCs require the specification of a system address as part of the
data. PCCCs support different formats of system addresses, but the only
form described in this manual is a binary memory address of something in
the file storage of the processor. The form recommended is compatible
with the form used in the 6008-LTV processor. Thus, the term “system
address” in the context of the following command descriptions is the
following seven-byte value.
06 FF file number FF element number
For instance, the 7-byte system address 06 FF 01 00 FF 02 01 specifies
element 258 (0102h) in file 1 (0001h).
Supported PCCCs