Warm boot, Cold boot – ProSoft Technology MVI71-MCM User Manual
Page 73
Reference MVI71-MCM
♦ PLC Platform
Modbus Communication Module
ProSoft Technology, Inc.
Page 73 of 111
December 28, 2007
Blocks -6000 to -6003 and -6100 to 6103, Master Command List Data for ports 1
and 2, respectively:
Offset Description
Length
0
-6000 to 6016 and -6100 to 6116
1
1
-6000 to 6016 and -6100 to 6116
1
2 to 11
Command Definition
10
12 to 21
Command Definition
10
22 to 31
Command Definition
10
32 to 41
Command Definition
10
42 to 51
Command Definition
10
52 to 61
Command Definition
10
62 to 63
Spare
2
Each of these blocks must be handled by the ladder logic for proper module
operation. The processor can request the module's configuration by sending a
configuration read request block, block code 9997, to the module. The format of
this request block is as follows:
Offset Description
Length
0 9997
1
1 to 63
Spare
63
When the module receives this command block, it transfers the module's current
configuration to the processor. If the block transfer interface is used, the blocks
defined in the previous tables (-9000 and -6000 series blocks) will be sent from
the module. If the side-connect interface is used, the user data files will be
updated directly by the module.
Warm Boot
This block is sent from the PLC processor to the module (output image) when the
module is required to perform a warm-boot (software reset) operation. This block
is commonly sent to the module any time configuration data modifications are
made in the data registers. This will force the module to read the new
configuration information and to restart. The structure of the control block is
shown in the following table:
Offset Description
Length
0 9998
1
1 to 63
Spare
63
Cold Boot
This block is sent from the PLC processor to the module (output image) when the
module is required to perform the cold boot (hardware reset) operation. This
block is sent to the module when a hardware problem is detected by the ladder
logic that requires a hardware reset. The structure of the control block is shown
in the following table:
Offset Description
Length
0 9999
1
1 to 63
Spare
63