User manual

Chapter 6
PLC-5/VME Processor
Communications Commands
6-7
Byte Description
12,13 Number of data files used (highest assigned file number + 1) (low byte first)
14, 15 Number of program files used (highest assigned file number + 1) (low byte first)
16 Forcing status
Bit 0 0 = no forces active 1 = forces active
Bit 4 0 = no forces present 1 = forces present
All other bits = 0
17 Memory protect
Bits 7-0 0 = memory not protected any bit set = memory is protected
18 RAM invalid
Bits 7-0 0 = RAM valid any bit set = invalid RAM
19 Debug mode (non zero means Debug mode is on)
20, 21 Hold point file (low byte first) if Debug mode is on
22, 23 Hold point element (low byte first) if Debug mode is on
24, 25 Edit time stamp seconds (low byte first)
26, 27 Edit time stamp minute (low byte first)
28, 29 Edit time stamp hour (low byte first)
30, 31 Edit time stamp day (low byte first)
32, 33 Edit time stamp month (low byte first)
34, 35 Edit time stamp year (low byte first)
36 Port number this command received on (10H = port 1A, 11H = port 1B, 20H = port
2A, 21H = port 2B, 30H = port 3A, )
Error Codes
Extended status codes are reported in the response packet. The STS byte
contains 00H if no error, F0H when the PLC-5/VME processor detects an
error. If an error, the error code is indicated in the EXT STS byte
as follows:
STS EXT STS Description
00H – No error
F0H
10H Illegal command or format
20H Host has a problem and will not communicate
30H Remote station host is missing, disconnected, or shut down
40H Host could not complete function due to hardware fault
50H Addressing problem or memory protect rungs
60H Function disallowed due to command protection selection
80H Compatibility mode file missing or communication zone problem
90H Remote station cannot buffer command
B0H Remote station problem due to download