Meggitt VM600 User Manual

VM600 networking manual MAVM600-NET/E 9 - 17
Edition 9 - February 2018
AMC8 card
SETTING UP A MODBUS CONNECTION (CPUM SW VERSION 071 OR LATER)
9.5 AMC8 card
In addition to the existing AMC8 functionality (see 8.7 AMC8 card), CPUM cards running
firmware version 071 or later provide additional functionality.
9.5.1 Read holding registers
To be consistent with the MPC4 cards behaviour, a 16-bit register has been added for each
channel and each multi-channel output that maps information defined in Table 9-15.
Address offset (Aoff): from 38 to 49.
Modbus function: 03 or 04.
This information is accessed using the channels from “Channel 1” to “Channel 8” as defined
in Table B-3 (available at addresses 4903, 4904, …, 7730).
Where 4903 is the first channel of the first slot and 7730 is the last channel of the last slot.
Table 9-15: Mapping of holding registers for AMC8 channel status
Bit Status Meaning when not set (0) Meaning when set (1)
b0 A− Channel not in Alarm− condition Channel in Alarm− condition
b1 A+ Channel not in Alarm+ condition Channel in Alarm+ condition
b2 D− Channel not in Danger− condition Channel in Danger− condition
b3 D+ Channel not in Danger+ condition Channel in Danger+ condition
b4 to
b15
Not used

Meggitt VM600 Specifications

General

Brand	Meggitt
Model	VM600
Category	Measuring Instruments
Language	English