CAL Controls CAL 3300 Connectivity to 3150-MCM
Problem Solution Overview
We performed testing between the subject device and our 3150-MCM product.
Solution Brief
Our testing generated the following results:
- We were able to successfully communicate with the device. (see below for configuration parameters used during the testing)
- The product supports Modbus function codes 1, 3, 5, 6, 16 for data movement.
Configuration:
The product testing was performed with the following settings used for both devices.
- Baud: 9600
- Parity: None
- Stop: 1
- Mode: RTU Master Mode
- Physical Connection : RS-232 (3 wire connection)
The Module Configuration used in our testing was as follows:
|
Address
|
0
|
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
|
N7:0
|
0
|
0
|
5
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
|
N7:10
|
1
|
1
|
5
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
|
N7:20
|
4
|
1
|
2
|
130
|
150
|
0
|
0
|
0
|
4
|
0
|
This configuration, in combination with the example ladder logic referenced below, generates the following memory map: N10:0 to N10:129 - Slave Data
N10:130 to N10:149 - Slave Error Table (Contains revision level information also)
N10:150 to N10:199 - Master Error Table (Contains status of commands for diagnostics)
Command List:
The following command list shows some of the commands which were used to test the communications:
|
Address
|
0
Port
Number
|
1
Slave
Number
|
2
Function
Node
|
3
Source
Address
|
4
Count
|
5
Dest.
Address
|
6
Read
Type
|
|
N7:50
|
1
|
1
|
3
|
28
|
1
|
0
|
0
|
|
N7:60
|
1
|
1
|
3
|
127
|
1
|
1
|
0
|
|
N7:70
|
5
|
1
|
6
|
200
|
1
|
127
|
0
|
|
N7:80
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
|
N8:90
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
Our test command list performs the following functions.
- N7:50 This command reads the Temperature variable and places the value into N10:0.
- N7:60 This command reads the value of SP_1 (setpoint 1) and places the value into N10:1.
- N7:70 This command writes a value from N10:200 and sets SP_1 (setpoint 1) in the CAL 3300.
Cable Connection:
The physical connection which was used during testing was as follows:
|
MCM Module
|
|
Device
|
|
Pin 2 Rx
|
--------------------------------
|
Pin 9 Tx
|
|
Pin 3 Tx
|
--------------------------------
|
Pin 10 Rx
|
|
Pin 5 Gnd
|
--------------------------------
|
Pin 11 Gnd
|
|
Pin 7 RTS
|
----------|
|
|
|
Pin 8 CTS
|
----------|
|
Jumper between RTS/CTS
on module must be installed
|
For ease of installation, termination on the ProSoft module was accomplished using our screw termination adaptor for the DB-9 plug. A similar screw termination plug is also available for the DB-25 required for the 3100-MCM.
The part number for these is:
1451-9F : DB-9 to RS-422/RS-485 Screw Terminals (for 3150-MCM)
1452-25M : DB-25 to RS-422/RS-485 Screw Terminals (for 3100-MCM)
|
